Mathematics High School

## Answers

**Answer 1**

maybe c i think or B but try C

## Related Questions

help asap God bless your loved ones and i hope u get rich if u answer this question

### Answers

**Answer:**

All except the second to last.

Evaluate u + xy, for u = 18, x = 10, and y = 8.

### Answers

**Answer:**

98

**Step-by-step explanation:**

u + xy

u = 18

x = 10

y =8

18 + 10*8 = 18 +80

= 98

**Answer:**

the answer is 98

**Step-by-step explanation:**

u+xy

18+10*8

18+80

98

ten out of 32 people surveyed they played among us. what percent of people surveyed play among us?

### Answers

**Answer:**

31.25% of the players survived

**Step-by-step explanation:**

10** ÷** 32 = 0.3125

0.3125 **·** 100 = 31.25%

0.3125 but rounded would be 31%

Is it ever too late to save for retirement?

a. yes, you want to begin saving at least 5 years before you plan to retire.

b. yes, you want to begin saving at least 25 years before you plan to retire.

c. yes, you want to begin saving at least 35 years before you plan to retire.

d. yes, you want to begin saving at least 45 years before you plan to retire.

### Answers

It can be t**oo late **to **save **for **retirement. **You want to begin **saving **at least **45 years **before you** plan to retire.**

When to start savings for retirement?

**Retirement **is when labour stops working at a regular job. When a person **retires, **they would have a reduced source of income. This is why it is important to **save **for **retirement. **The earlier one starts to save for **retirement, **the more money the person would have when they retire.

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Explain the connection between ∠2 and ∠B. A triangle has angle measures 50 degrees, 65 degrees, and B. 2 lines extend from a horizontal line to form 3 angles. The angles are 50 degrees, 2, 65 degrees.

### Answers

Since the** two angles are equal**, hence th**e angles B and angle 2 are congruent.**

Congruent triangles

Congruent triangles are triangles that are similar to each other

Since the **sum** of the i**nterior angles** of a triangle is 180°, then

m∠B + 50° + 65° = 180°

Determine the **value of <B**

m∠B = 180° - (50° + 65°)

m∠B = 180° - 115°

**m∠B= 65°. **

Similarly, the **sum of angle **on a straight line is 180 degrees

m∠2 + 50° + 65° = 180°

m∠2 = 180° - (50° + 65°)

m∠2 = 180° - 115°

**m∠2= 65°**

As we can see that the** two angles are equal**, hence th**e angles B and angle 2 are congruent.**

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Solve this it is important

### Answers

**Answer:**

(a) 18

(b) mulitplication, division

(c) zero

(d) Multiplying a number by 1 will result in the originl number

(e) 0, 0, neutral integer

- - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - -- -- - - - -

**Question:-**

Solve [questions in attachment]

**Answer:-**

18*13=13*18

Whole numbers are closed under addition and multiplication operation

Remember, whole numbers include zero and all positive numbers.

If we use addition or multiplication, we'll get a number in the whole numbers set, but if we use one of the other two operations we might end up with a negative number or a fraction, which isn't included in the set.

Division by 0 is not defined; dividing by 0 results in infinity, which isn't a number.

1 is the identity for multiplication; if we multiply any number by 1, we'll get that number back.

If 0 is added to a number the sum will remain the same. Hence 0 is called the **additive identity **in the whole numbers.

Example:- 4+0=4

Good luck.

- - - - -- - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - -

What is the period of the graph of y = 5 sin (2x) + 4?

### Answers

**Answer:**

Y = 5 sin(2x) + 4

The amplitude of the sin itself is 1 .

The amplitude of 5sin is 5 .

Every time the "argument" of the sin increases by 2π

another period starts.

The first period goes from zero until 2x = 2π .

So the length of the period is π .

The phase shift is the value of the angle when x=0.

That's zero.

The sin itself wiggles up and down, regularly and symmetrically,

above and below the x-axis (y=0). In this equation, the whole thing

is shifted up 4 units by that +4 on the end, so it's wiggling up and down

above and below the line y=4. The vertical shift is +4 .

If this function were an electrical signal, we would say that its

period is π seconds, its frequency is 1/π Hz, and it has an

AC amplitude of 5 riding on a DC component of 4 .

**Step-by-step explanation:**

**Answer:**

its 1

**Step-by-step explanation:**

i just took the test

The diagonals of an isosceles trapezoid are represented by 4x – 47 and 2x 31. what is the value of x?

### Answers

Answer:

The value of x is 39.

Step-by-step explanation:

**Answer:**

value of x is 39

**Step-by-step explanation:**

A store sells meat in small, medium and large size

packages. the small packages have a mean weight of 1

pound and a standard deviation of 0.1 pound. if the

weights for the small packages of meat are approximately

normally distributed, about 95% of the data falls between

which two values?

a. 0.8 and 1.2

b. 0.9 and 1.1

c. 0.8 and 1.1

d. 0.7 and 1.3

### Answers

Using the **Empirical Rule**, it is found that the values between which **95% of the data** falls are given by:

**a. **0.8 and 1.2.

What does the Empirical Rule state?

It states that, for a **normally distributed** random variable:

Approximately **68%** of the measures are **within 1** standard deviation of the mean.Approximately **95%** of the measures are **within 2** standard deviations of the mean.Approximately **99.7% **of the measures are **within 3** standard deviations of the mean.

Considering the **mean **of 1 pound and the **standard deviation** of 0.1 pounds, 95% of the data is between:

1 - 2 x 0.1 = 0.8 pounds and 1 + 2 x 0.1 = 1.2 pounds.

Hence **option A** is correct.

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SOMEONE PLEASE HELP ME WITH THIS

SHOW WORK ON HOW TO GET THE ANSWER

### Answers

**Answer:**

Here!

**Step-by-step explanation:**

Hope this helps! Have a great day/night

Can someone help will give brainlist

### Answers

**Answer:**

option c, 70%

**Step-by-step explanation:**

80 total keychains

24 are blue

80 total keychain - 24 blue keychain = 56 non blue key chain

the probability of chooising one of these 56 keychain is

56 / 80 = 0.70

0.70 x 100% = 70%

OR

the probability of chooising a blue keychain is

24 / 80 = 0.30

1 - 0.30 = 0.70 (1 = the total amount)

**Answer:**

C. 70%

______

[tex]\sf Solve[/tex]

When finding the unknown percentages, convert the part number to a fraction, then into a decimal.Next, multiply the decimal percentage by 100

______

[tex]\sf Solve(pt.2)[/tex]

Using that method, the percentage is 30%The rest would have to be 70% to make 100% keychains.

Thus, there is a 70% chance you will NOT pick a blue keychain.

The Smiths bought a new house for $90,000. If the steady annual growth rate is 7.8%, how much will the house be worth after

3 years ?

### Answers

**Answer:**

$ 112 745 .39

**Step-by-step explanation:**

7.8 % = .078 in decimal

90 000 ( 1 + .078)^3 = 112745.39

**Answer:**

After 3 years ,the house will worth : **$112745.38968**

**Step-by-step explanation:**

**Method 1:**

the house will worth after 1 year :

[tex]90000+90000\times \frac{7.8}{100} =97020[/tex]

the house will worth after 2 years :

[tex]97020+97020\times \frac{7.8}{100} =104587.56[/tex]

the house will worth after 3 years :

[tex]104587.56+104587.56\times \frac{7.8}{100} =112745.38968[/tex]

**Method 2:**

we consider the geometric sequence Un of :

First term U₀ = 90000

common ratio q = 1 + (7.8/100) = 1.078

Then

[tex]U_{3}=q^{3}\times U_{0}[/tex]

Then

[tex]U_{3}=(1,078)^{3}\times 90000=112745.38968[/tex]

6b - 11 = -23 what is b

### Answers

**Answer:**

8b-5=6b+23

8b-6b=23+5

2b=28

b=14

**Step-by-step explanation:**

You want to get the variable by itself so you add 11 to -23 which is 12 then you divide 12 by 6 and you get b=2.

Please answer the following if 5x4 is 20 what is 9x2?

### Answers

**Step-by-step explanation:**

well, 5×4 IS 20.

I am not sure, what your teacher wants here.

and therefore, as a fact, 9×2 = 18.

maybe it is to show the fraction relationship between the teens of the first operation and the terms of the second.

9 = 5×9/5

2 = 4×2/4

so, 9×2 = 9/5 × 2/4 × 20 = 18/20 × 20 = 18

I consider this nonsense, but it is the only thing I can currently think of to do with these operations in relation to each other.

You answer 32 questions correctly on a 45-question test. You need a score of at least 70% to pass. Do you pass? Explain.

### Answers

**Answer: you pass because you would get 71%**

**32÷45= 71.1111111111111 (repeating decimal)**

**then we round, and we get 71%**

Answer: Yes, but narrowly

71.1%

Step-by-step explanation:

100%=45

x%=32

100×/x% = 45/32

Cross multiply

x = 71.1111%

Stella buys 6 tacos and 4 enchiladas for 52 dollars. Eliana buys 7 tacos and 9 enchilladas for 78 dollars.

Part A: Enter the cost for one taco.

Part B: Enter the cost for one enchilada.

### Answers

**Answer:**

Let tacos be x and enchiladas be y

6 tacos + 4 enchiladas = 52

becomes

6x+4y=52

^^that's our first equation

Now, the second equation

7 tacos + 9 enchiladas = 78

7x+9y = 78

^^^that's our second equation

Isolate y in the first equation:

6x+4y=52

4y=52-6x

y = (52-6x)/4

^^^Let's call this equation 3

Now, sub-in equation 3 into equation 2

*replace the y*

Equation 2: 7x+9y = 78

Sub-in

7x+ 9 ( (52-6x)/4) = 78

Do some algebra (get your x terms on one side) and you will find your x value

7x + 117 - 13.5x = 78

(7x-13.5x) = 78-117 *get your x terms on one side

x=6

That's the cost of one taco.

Now, find y. Pick an equation (1,2 or 3). Let's pick 3 since y is already isolated.

All you do is plug in your x value.

Equation 3: y = (52-6x)/4

y= (52 -6(6))/4

...

You should be able to solve this on your own

**Step-by-step explanation:**

:)) You can solve for y now

Ivana micheli takes out $12,000 endowment insurance policy when she is thirty-seven years old.

annual premium: $_____

quarterly premium: $_____

### Answers

At a **rate of $0.37 per $100**, Ivan's **annual premium** is **$44.40** and the **quarterly premium** is **$11.10**.

What is an insurance premium?

An **insurance premium** is a charge imposed on the **insured** by the **insurance company** for the **insurance policy** taken.

Periodically, the **insured** is expected to remit the **premium** to the **insurer** a **coverage fee**.

Data and Calculations:

Insurance coverage = $12,000

Ivana's age = 37 years

Rate of premium = $0.37 per $100

**Annual premium = $44.40** ($0.37 x $12,000/$100)

**Quarterly premium = $11.10** ($0.37 x $12,000/$100)/4

Thus, at a **rate of $0.37 per $100**, Ivan's **annual premium** is **$44.40** and the **quarterly premium** is **$11.10**.

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Determine whether a triangle with the given side lengths is a right triangle.

7, 24, 25

5, 12, 13

9, 16, 25

16, 22, 34

The choices are

Yes

No

Not enough Info

### Answers

The lengths that represents the **side lengt**h of a **right triangle **are 7, 24, 25 and 5, 12, 13.

What is a right triangle?

A **right triangle **is a triangle that has three sides known as the opposite, adjacent and hypotenuse. The hypotenuse is the longest sides of the triangle. The opposite side is the side that faces an angle. The adjacent side is the third side.

7² + 24² = 25²

5² + 12² = 13²

9² + 16² = 18.4²

16² + 22² = 27.2²

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What is the difference quotient for the function f(x) = -1/5x-12?

### Answers

The **difference quotient **for the **function **[tex]f(x) = -\frac{1}{5x-12}[/tex] is [tex]\frac{5}{(5x+5h-12)(5x-12)};[/tex] h≠0

Option B) is the correct answer.

What is the difference quotient for [tex]f(x) = -\frac{1}{5x-12}[/tex] ?

Given that;

[tex]f(x) = -\frac{1}{5x-12}[/tex]difference quotient for f(x) = ?

We know that **difference quotient **is expressed as;

[tex]\frac{f(x+h)-f(x)}{h}[/tex]

Next, substitute **x+h** for x.

Hence;

[tex]f(x+h) = -\frac{1}{5(x+h)-12}[/tex]

Now,

[tex]\frac{f(x+h)-f(x)}{h} = \frac{-\frac{1}{5(x+h)-12}-(-\frac{1}{5x-12}) }{h} \\\\= \frac{5}{(5x-12)(5h+5x-12)}\\\\= \frac{5}{(5x+5h-12)(5x-12)};[/tex]h≠0

The **difference quotient **for the **function **[tex]f(x) = -\frac{1}{5x-12}[/tex] is [tex]\frac{5}{(5x+5h-12)(5x-12)};[/tex] h≠0

Option B) is the correct answer.

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please answer!! will give brainliest

### Answers

**Answer:**

3. $3511.31

4. 24 months (2 years)

5. about $9,069.57

**Step-by-step explanation:**

The attachments show the results from use of a **time-value-of-money** (TVM) app on a **calculator** with the given **car loan values**. Similar functions are available using a spreadsheet.

__

3.

You want the future value of the loan after 14 monthly payments have been made. **The balance is 3,511.31 after 14 months**.

__

4.

The number of payments required to bring the balance to zero is computed to be about 23.2553. It will take **24 months to pay off the loan**. The last loan payment will not be the full amount.

__

5.

The total **amount paid** is approximately the monthly payment multiplied by the required number of payments:

$390 × 23.2553 ≈ **$9,069.57**

_____

*Additional comment*

The actual amount will depend on when in the last month the last payment is made. (Interest is generally charged on a daily basis when the payoff nears.)

The fourth attachment shows the balance after 23 payments is $99.23. The amount of interest charged for a full month on that amount is ...

$99.23×0.065×(1/12) = $0.54

So, the last payment due could be ...

$99.23 +0.54 = $99.77

The total of 23 regular payments and a last payment of $99.77 is ...

23×$390 +99.77 = **$9069.77**

If you want accuracy to the penny, it is best achieved by creating an amortization schedule, in which interest charges are rounded to the nearest cent each month.

A farmer plans to fence a rectangular pasture adjacent to a river the pasture must contain 405,000 square meters

### Answers

The **dimensions **of the **garden **that will require the least amount of fencing are** 450m and 900 m **and the **perimeter **of the area is **1800 m**.

What is the area of the rectangle?

It is defined as the **area **occupied by the **rectangle **in **two**-**dimensional **planner **geometry**.

The **area **of a **rectangle **can be calculated using the following **formula**:

**Rectangle area = length x width**

Let's **suppose x **and **y **are the sides of the **rectangular garden **and y is the **parallel **to the **river**.

Then according to the problem:

**2x + y = P ..(1)**

P is the perimeter of the rectangle.

**xy = 405000** (area of the rectangle)

Plug the value of y in the equation (1) from the above equation.

P(x) = 2x + 405000/x

P'(x) = x—405000/x² = 0

**x = 450 m**

**P''(x) > 0 hence at x = 450 the value of P(x) is minimum.**

y = 405000/450

**y = 900 m**

**P(min) = 1800 m**

Thus, the **dimensions **of the **garden **that will require the least amount of fencing are** 450m and 900 m **and the **perimeter **of the area is **1800 m**.

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Help me pls, ASAP

ุุุุุุุุุุุุ

### Answers

**Answer:**

[tex] \huge \pink { \overline{ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad}}[/tex]

1. Number of copies of Math Books sold for one week by a bookstore.

Sunday - 180

Monday -270

Tuesday -250

Wednesday -310

Thursday -420

Friday -220

Saturday - 510

*=** **2**,**1**6**0** *

*→**T**h**e** **n**u**m**b**e**r** **o**f** **c**o**p**i**e**s** **o**f** **M**a**t**h** **b**o**o**k**s** **s**o**l**d** **f**o**r** **o**n**e** **w**e**e**k** ** **b**y** **a** **b**o**o**k**s**t**o**r**e** **i**s** ** **2**,**1**6**0*

*[tex]\huge \pink { \overline{ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad}}[/tex]*

**Step-by-step explanation:**

*#**C**a**r**r**y** **O**n** **L**e**a**r**n**i**n**g*

*[tex] \huge \rm \underline \purple{study \: well}[/tex]*

* ** ** ** ** ** ** ** ** ** **⤵*

* ** ** ** ** ** * Choi Eunbyul<3

PLS HELP ASAP!! ALGEBRA 9!!

4.29-x+36=102-2.52x+2

### Answers

**Answer:**

** ** x = 29

**Step-by-step explanation:**

If the equation is :

4.2(9-x)+36=102-2.5(2x+2)

**→distribute **4.2 and -2.5 in parenthesis

4.2(9 - x) + 36 = 102 -2.5(2x + 2)

37.8 - 4.2x +36 = 102 -5x -5

→ have **terms with x = terms without x **

**Keep** the terms you need the way they are, and **move** the terms you need **on the other side **of equal sign **with changed sign**.

4.2(9 - x) + 36 = 102 -2.5(2x + 2)

37.8 - 4.2x +36 = 102 -5x -5

- 4.2x +5 x = - 37.8 - 36 + 102 - 5

→ Combine like terms

0.8x = 23.2

→ Divide both sides by 0.8

** x = 29**

Suppose you drive four miles South and then ten miles East. How far away are you from your starting point?

### Answers

**Answer:**

73920 feet away from your starting point in total.

Convert the miles to feet, then add them together.

im broke have this but like whats 24X58-9=

800x24=?

### Answers

**Answer:**

24X58-9=1,383

800x24=19,200

**Step-by-step explanation:**

24x58=(24x8)+(24x50)

24x8=160+32=192

24x50=200+1,000=1,200

192+1,200=1,392-9=1,383

800x24=3,200+16,000=19,200

Find the equation of the tangent line to g(x) = 4x² + 6x at x = 0

Simplify any fractions

### Answers

**Answer:**

y = 6x

**To find equation,**

1) Find Derivative

2) Find the slope at x

3) Find coordinates

Lets first Derive The Equation

[tex]\sf \rightarrow y = 4x^2 + 6x[/tex]

[tex]\sf \rightarrow \dfrac{dy}{dx} = (2)4x^{2-1} + (1)6x^{1-1}[/tex]

[tex]\sf \rightarrow \dfrac{dy}{dx} = 8x + 6[/tex]

**Secondly find Slope at x = 0**

[tex]\sf \rightarrow \dfrac{dy}{dx} = 8(0) + 6[/tex]

[tex]\sf \rightarrow \dfrac{dy}{dx} = 6[/tex] Yep so the **slope(m) is 6.**

Recall, tangent line has the same slope.

**Now third step is to find coordinates**

At x = 0, y = 4x² + 6x ⇒ y = 4(0)² + 6(0) = 0 [tex]\star[/tex]** so coordinates: (0, 0)**

**Equation:**

y - y₁ = m(x - x₁)y - 0 = 6(x -0)y = 6x

**Answer:**

y = 6x

**Step-by-step explanation:**

Given:

[tex]\displaystyle \large{g(x)=4x^2+6x}[/tex]

To find:

Tangent line equation at x = 0

First, derive the equation using power rules. Here are some power rules formula:

Power Rules

[tex]\displaystyle \large{f(x) = x^n \to f'(x)=nx^{n-1}}\\\\\displaystyle \large{f(x)=kx^n \to f'(x)=knx^{n-1} \quad \tt{(k \ \ is \ \ constant.)}}\\\\\displaystyle \large{f(x)=k \to f'(x)=0 \quad \tt{(k \ \ is \ \ constant.)}[/tex]

Apply power rules:

[tex]\displaystyle \large{g'(x)=4(2)x^{2-1}+6(1)x^{1-1}}\\\\\displaystyle \large{g'(x)=8x+6}[/tex]

Derivative Definition

Derivative simply means slope or gradient at any points (x,y) and it is also rate of changes.

Since we want to find the slope at x = 0 (so that the line will be tangent to this point) then substitute x = 0 in g’(x):

[tex]\displaystyle \large{g'(0)=8(0)+6}\\\\\displaystyle \large{g'(0)=6}[/tex]

Now we have slope = 6 at x = 0. Next, find y-value at x = 0, simply substitute x = 0 in g(x) to find y-value:

[tex]\displaystyle \large{g(0)=4(0)^2+6(0)}\\\\\displaystyle \large{g(0)=0}[/tex]

So we have point (0,0) which is origin point. Before we head to next step, let’s review on what we have:

Slope at x = 0 is 6Point (0,0)

Next, we use point-slope form to create the equation and convert to slope-intercept form:

Point-Slope

[tex]\displaystyle \large{y-y_1=m(x-x_1)}[/tex]

Determine:

[tex]\displaystyle \large{m=6}[/tex][tex]\displaystyle \large{(x_1,y_1)=(0,0)}[/tex]

Therefore:

[tex]\displaystyle \large{y-0=6(x-0)}\\\\\displaystyle \large{y=6x}[/tex]

Therefore, the equation of tangent line to the parabola at x = 0 is **y = 6x**

CAN SOMEONE PLEASE HELP ME ON THIS

### Answers

I think that you just have to put the x values to the equation for example :

Find the surface area of a square pyramid with side length 3 m and slant height 3 m.

For 50 points!

### Answers

**Answer:**

**27 m²**

**Step-by-step explanation:**

Finding surface area

Area (4 triangles) + Area (square base)4 x 1/2 x 3 x 3 + 3 x 318 + 9**27 m²**

**Answer:**

27 m²

**Step-by-step explanation:**

The surface area of a square pyramid comprises:

one square4 congruent triangles

Area of a square = x² (where x is the side length)

Area of a triangle = 1/2 × base × height

Given:

slant height = height of triangle = 3 mside length = x = base of triangle = 3 m

Surface area = area of square + 4 × area of triangle

= 3² + 4(1/2 × 3 × 3)

= 9 + 4(9/2)

= 9 + 18

= **27 m²**

Instructions: Find the surface area of each figure. Round your answers to the nearest tenth, if necessary.

### Answers

**Answer:**

surface area (rounded to the nearest tenth) : **282.7** yd²

**Step-by-step explanation:**

Formula ……………………………………………………………

surface area of a cylinder = 2 × (area of the base) + the lateral surface area

= 2πr² + 2πrh

= 2πr(r + h)

==================================

surface area of a cylinder = 2×π×3×(3+12)

= 282.743339 yd²

Sam runs for 10 minutes The graph shows his puse, in beats per minute. 100- (beats per min) 80- 1 2 3 5 6 7 8 9 10 Time (min) By drawing a tangent, work out the rate at which his pulse is increasing after 3 minutes. Give the units of your answer. NEW Answer (Total 4 marks) Page 2 of 13

### Answers

The **rate** at which his pulse is **increasing **after 3 minutes is 9.5 beats per minute

How to determine the beat rate after 3 minutes?

The given graph shows the curve and the tangent.

From tangent line, we have the following points:

(x,y) = (3,119) and (1,100)

The beat rate (m) at this point is:

[tex]m = \frac{y_2 -y_1}{x_2 -x_1}[/tex]

So, we have:

[tex]m = \frac{100 - 119}{1 - 3}[/tex]

Evaluate the differences

[tex]m = \frac{-19}{-2}[/tex]

Evaluate the quotient

m = 9.5

Hence, the **rate** at which Sam's pulse is **increasing **after 3 minutes is 9.5 beats per minute

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