Answer:6 hours have passed by.

Step-by-step explanation:

0.8x= 84-79.2 where x is the number of hours.

O.8x = 4.8

Divide both sides by 0.8

X= 6

brainliest quick!

Aiden wanted to model -15 + 15 = 0 on the number line. He first drew an arrow 15 units long starting from zero that pointed to the left. He then draws another arrow 15 units long starting from zero that points to the right. What error did Aiden make?

A. The first arrow he drew should have pointed to the right to represent -15.

B. The second arrow he drew should have pointed to the left to represent 15.

C. The first arrow he drew should have started at -15 instead of 0.

D. The second arrow he drew should have started at -15 instead of 0.

**Answer:**

c

**Step-by-step explanation:**

**Answer:**

it's D

**Step-by-step explanation:**

The number never goes over 0 so there is no need to put anything above 0

Two angles are supplementary. The measure of the larger angle is 12 degrees more than three times the smaller angle. Find the measures of the angles

**Answer:**

*Measure of first angle: 42 degrees,*

*Measure of second angle: 138 degrees*

**Step-by-step explanation:**

*Let us say x ⇒ measure of the smaller angle, y ⇒ measure of the larger angle*

1. Now given that the measure of the larger angle is 12° more than 3 times the smaller angle: y = 12 + 3x

2. If these angles are supplementary, we could formulate another equation were the two angles add to 180°: x + y = 180

3. In this situation it is convenient to apply substitution as to solve for x, y:

*1. x + ( 12 + 3x ) = 180*

*2. x + 12 + 3x = 180*

*3. 4x + 12 + 180*

*4. 4x = 168*

*5. **x = 42 degrees*

4. Now substitute this value of x into the first equation y = 12 + 3x, and to solve for y as well:

*1. y = 12 + 3 ( 42 )*

*2. y = 12 + 126*

*3. **y = 138 degrees*

Here we need to find two **angles **given that the **angles **are **supplementary **and one is 12° larger than the other.

the two **angles **are **84°** and **96°.**

We should start by defining what **supplementary angles** are.

Two **angles **a and b are **supplementary **if:

a + b = 180°.

Now, we also know that one of the **angles **is 12° larger than the other, so we can write:

a = b + 12°

Now that we have that **equation**, we can replace it in the first one, so we get:

a + b = 180°

(b + 12°) + b = 180°

Now we can solve this for b.

2*b + 12° = 180°

2*b = 180° - 12° = 168°

b = 168°/2 = **84°**

To find the value of a, we can use the **equation**:

a = b + 12°

a = 84° + 12° = **96°.**

Then the two **angles **are:

**84°** and **96°.**

If you want to learn more, you can read:

https://brainly.com/question/18164299

Solve for a given 2e^a =4b

**Answer:**

a = ln (2b)

**Step-by-step explanation:**

2e^a =4b

Divide each side by 2

2/2 e^a =4/2b

e^a = 2b

Take the natural log of each side

ln(e^a) = ln(2b)

a = ln (2b)

If the first term of an arithmetic sequence is 4 and the difference between con-

secutive terms is 5, what is the second term? The third term? The twelfth? The

eightieth? The nth?

Answer:third term=14 twelfth term=59

Step-by-step explanation:

first term=a=4

Common difference=d=5

Second term=4+5=9

Third term=9+5=14

Using Tn=a+d(n-1)

T12=4+5(12-1)

T12=4+5x11

T12=4+55

T12=59

Twelveth term=59

There were 15 students running in a race. How many different arrangements of first, second, and third place are possible?

**Answer:**

The area 2730 possible arrangements of first, second, and third place.

**Step-by-step explanation:**

The order in which the students finish is important. For example A, B and C is a different finishing order(outcome) than B, A and C. So we use the permutations formula to solve this question.

**Permutations formula:**

The number of possible permutations of x elements from a set of n elements is given by the following formula:

[tex]P_{(n,x)} = \frac{n!}{(n-x)!}[/tex]

**In this question:**

3 from a set of 15. So

[tex]P_{(15,3)} = \frac{15!}{(15-3)!} = 2730[/tex]

The area 2730 possible arrangements of first, second, and third place.

Find the values of the variable y, for which:

the difference between the fractions y+12/y-4 and y/y+4 is equal to their product

**Answer:**

y = 12

**Step-by-step explanation:**

Ordinarily, in math, when we say "the difference between ..." we mean the second listed item is subtracted from the first. (In English, we often mean "the positive difference between ..." so the order doesn't matter.)

We'll assume we are only interested in the case where the difference is in the order listed.

[tex]\dfrac{y+12}{y-4}-\dfrac{y}{y+4}=\dfrac{y+12}{y-4}\cdot\dfrac{y}{y+4}\\\\\dfrac{(y+12)(y+4)-(y-4)(y)}{y^2-16}=\dfrac{(y+12)(y)}{y^2-16}\\\\0=\dfrac{y^2-8y-48}{y^2-16}=\dfrac{(y-12)(y+4)}{(y-4)(y+4)}=\dfrac{y-12}{y-4}\qquad\text{$y\ne -4$}\\\\\boxed{y=12}[/tex]

There is one solution.

_____

*Comment on the solution*

If you were to "clear fractions" by multiplying the equation by (y^2-16), you would also obtain the extraneous solution y=-4. That is why we did not solve it that way.

y = -16x2 + 242x + 78

**Answer:**

y=210x+78

**Step-by-step explanation:**

y=-16x*2+242x+78

y=-32x+242x+78

y=210x+78

A wedge of cheese in the shape of a triangular prism is shown below.

Find the surface area of the cheese.

_______Square feet

**Answer:**

[tex]144 $ Square feet[/tex]

**Step-by-step explanation:**

The given triangular prism comprises of two equal right triangles and three rectangles.

The Surface Area of the Prism

=Area of Two Triangles + Area of Three Rectangles

[tex]=2(0.5X6X8)+(6X4)+(10X4)+(8X4)\\=48+24+40+32\\=144 $ Square feet[/tex]

**Answer: ****144**

**Step-by-step explanation:32+24+4-+48=144**

What is the length of AC? Brainliest for right answer

**Answer:**

2.3 units

**Step-by-step explanation:**

Select the correct symbol to compare the rates.

22 miles in 20 minutes 38 miles in 30 minutes

**Answer:**

<

**Step-by-step explanation:**

22/20=1.1

38/30=1.27

**Answer:**

<

**Step-by-step explanation:**

Will mark brainlist and give extra points bth grade math

**Answer:**

the answer is d

**Step-by-step explanation:**

**Answer:**

The answer is D

**Step-by-step explanation:**

The value of a car with an initial purchase price of $18,250 depreciates by

11% per year.

**Step-by-step explanation:**

This problem on depreciation of price.

**Given data**

initial price = $18,250

rate of depreciation = 11%

**to solve for the new price we must find 11 percent of the initial price (depreciated value) and subtract from the initial price, we have**

depreciation=

[tex]\frac{11}{100} *18250\\0.11*18250= 2007.5[/tex]

**Hence the depreciation= $2007.50**

the new amount is [tex]= initial amount - depreciation[/tex]

[tex]=18250-2007.50\\= 16242.50[/tex]

the new amount is $16242.50

A circle with circumference 8 has an arc with a 288 central angle what is the length of the arc

Answer:3.3

Step-by-step explanation:

Circumference=8

Φ=288

π=3.14

Radius=r

Circumference=2 x π x r

8=2 x 3.14 x r

8=6.28 x r

Divide both sides by 6.28

8/6.28=(6.28 x r) /6.28

1.3=r

r=1.3

Length of arc =Φ/360 x 2 x π x r

Length of arc =288/360 x 3.14 x 1.3

Length of arc =0.8 x 3.14 x 1.3

Length of arc =3.3

Answer:32/5

Step-by-step explanation: did it in khan

Round 0.378 to the place underlined digit 3

**Answer:**

0.38

**Step-by-step explanation:**

7 is the 3rd digit, so 8 is greater then 5, so you round up, if it is correct, can you give brainiest

**Answer:**

0.40

**Step-by-step explanation:**

this is because the number before it is up to five and even more than 5 so we round it up by adding one to the next number and the remaining digit to zero

Verify that 1 + cos 2 theta / 2 cos theta = cos theta is an identity

**Answer and Step-by-step explanation:**

We want to verify that (1 + cos(2θ)) / 2cos(θ) = cos(θ).

Let's focus on the left side. Look at cos(2θ). This is an identity, so remember that cos(2θ) = cos²θ - sin²θ. Also, look at the 1. Remember that sin²θ + cos²θ = 1, so plug both of these expressions into our equation:

(1 + cos(2θ)) / 2cos(θ) =? cos(θ)

((sin²θ + cos²θ) + (cos²θ - sin²θ)) / 2cos(θ) =? cos(θ)

2cos²θ / 2cosθ =? cosθ

cosθ = cosθ

Thus, we have proved this is an identity.

Answer:

(1 + cos(2theta))/2cos(theta)

cos(2theta) = 2cos²(theta) - 1

(1 + 2cos²(theta) - 1)/2cos(thetal

2cos²(theta)/2cos(theta)

cos(theta)

Solve for I.

3x -8 < 23 AND

- 4x + 26 > 6

3x - 8 < 23

3x < 31

x = 31/3

-4x + 26 > 6

-4x > -20

x < 5

3x < 31

x = 31/3

-4x + 26 > 6

-4x > -20

x < 5

please answer this correctly I have to finish this today as soon as possible

Estimate the measure of this angle within 10°.

**Answer:**

It seems like it is 110 degrees.

**Step-by-step explanation:**

What is volume of a cylinder with base area 64pi cm² and a height equal to twice the radius? Give your answer in terms of pi.

512 pi

256 pi

1024 pi

4096 pi

**Answer:**

1024 pi

**Step-by-step explanation:**

The area formula is ...

A = πr^2

So, the radius is ...

r = √(A/π)

For the given area, the radius of the cylinder is ...

r = √(64π/π) = 8 . . . . cm

The height is said to be twice this value, so is 16 cm.

__

The volume of the cylinder is found from ...

V = Bh

where B is the base area and h is the height. Our cylinder has a volume of ...

V = (64π cm^2)(16 cm) = **1024π cm^3**

what are the steps for using integar tiles to evaluate the expression 45 divided by 15

**Answer:**

1. Gather 45 tiles

2. Split them up into groups of 15. Your answer will be the amount of piles you end up with. Hope this helps!

Please help ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing.

The answer would be d and e (-3 and -5) two solutions because it is a quadratic with two real roots and the working out is shown in the photo.

Express this number in scientific notation 0.0008235

8.235*10^-4

= 0.0008235

= 0.0008235

Giving brainliest to CORRECT answer.

**Answer:**

D

If you put the equation into a calculator, it will show a graph of it.

tell me the answer to the question plz

**Step-by-step explanation:**

(11.99+23.98+9.95)= 45.92

she has to pay = 45.92 - 20/100 (45.92)

= 45.92 - 9.18 = 36.74

so option

about 37 is right

40/50 to a simpel fraction

**Answer:**

4/5

**Step-by-step explanation:**

just divide by 10 since that's the largest number that both numbers can equally be divisible by

**Answer:**

4/5 because 40/50 simplified is 4/5 bc you knock off the zeros for question like that

**Step-by-step explanation:**

Divide the decimal 122.4 by 9

( 122.4÷9)

Answer:13.6

Step-by-step explanation:

122.4 ➗ 9=13.6

Harris Interactive® conducted a poll of American adults in August of 2011 to study the use of online medical information. Of the 1,019 randomly chosen adults, 60% had used the Internet within the past month to obtain medical information. Use the results of this survey to create an approximate 95% confidence interval estimate for the percentage of all American adults who have used the Internet to obtain medical information in the past month.

**Answer:**

[tex]0.60 - 1.96\sqrt{\frac{0.60(1-0.60)}{1019}}=0.570[/tex]

[tex]0.60 + 1.96\sqrt{\frac{0.60(1-0.60)}{1019}}=0.630[/tex]

The 95% confidence interval for the true proportion would be given by (0.570;0.630) .

And if we convert this into % we got (57.0%, 63.0%)

**Step-by-step explanation:**

The information given we have the following info given:

[tex] n = 1019[/tex] represent the sampel size

[tex] \hat p=0.6[/tex] represent the sample proportion of interest

The confidence level is 95%, our significance level would be given by [tex]\alpha=1-0.95=0.05[/tex] and [tex]\alpha/2 =0.025[/tex]. And the critical value would be given by:

[tex]z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96[/tex]

The confidence interval for the mean is given by the following formula:

[tex]\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}[/tex]

Replacing the info given we got:

[tex]0.60 - 1.96\sqrt{\frac{0.60(1-0.60)}{1019}}=0.570[/tex]

[tex]0.60 + 1.96\sqrt{\frac{0.60(1-0.60)}{1019}}=0.630[/tex]

The 95% confidence interval for the true proportion would be given by (0.570;0.630) .

And if we convert this into % we got (57.0%, 63.0%)

How many different 12-letter arrangements can be made using the letters in the word indianapolis?

**Answer:**

764

**Step-by-step explanation:**

Write the expanded form of h(3k-12.4)

Answer:3hk - 12.4h

Step-by-step explanation:

h(3k-12.4)

h x 3k - h x 12.4

3hk - 12.4h

When plotting points on the coordinate plane below, which point would lie on the y-axis?

(0, 1)

(7, 0)

(6, 8)

(8, 2)

1, 0 , 8, and 2 would all lie on the y-axis

**Answer:**

(0,1)

**Step-by-step explanation:**

i got it right

Which types of triangles can be formed by taking the cross-section of a rectangular prism like the one shown above?

Answer: Equilateral, isosceles and scalene.

Step-by-step explanation:

Match the plot events of Count of Monte Cristo by Alexandre Dumas with the appropriate plot elements.expositionrising actionclimaxfalling actionresolutionAfter completing his quest for revenge, Dants does a good deed for his valued friend Maximilian Morrel. He reunites Morrel with a lost lover. This kind act brings great joy to Morrel.Dants feels content after successfully reuniting the two lovers. He sails away to an unknown location, never to be seen again.In prison, Dants learns who set him up and caused his downfall. He soon escapes from prison and sets off on a quest for revenge. He vows to spend his fortune rewarding those who have been kind to him and punishing those who have harmed him. Over time, Dants brings complete devastation upon his enemies, Danglars, Fernand, Caderousse, and Villefort.Edmond Dants is a young, handsome, and talented man. After returning home from a long voyage, he's set to become captain of a ship and also marry his beautiful fiance, Mercds.Dantss perfect life causes three men, Danglars, Fernand, and Caderousse, to feel extremely jealous. They conspire to get Dants jailed for a crime he didn't realize he had committed. Their scheme succeeds when Villefort, the assistant crown prosecutor, realizes he can further his career by playing along. Dants is left to rot in jail.
simplify- 5^23 x 5^15
Is a percent increase for 50 to 70 = to the percent decrease from 70 to50
Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms.4x+9
Which student wrote an equation with a solution of x = -8Jenna: -3 ( x - 9 ) = -3Archer: 4 ( 2x - 16 ) = 16bothneitherjenna archer
Solve the equation.29= p x 20p= __
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sonar measures underwater distances by using?
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This graph provides data on the amount of water needed to grow four different crops, each used to produce ethanol, a fuel. For each crop, the data shows how many liters of water are needed to produce one liter of ethanol fuel. Which of the following would require using the most water? *Producing 100 L of ethanol from sugar caneProducing 200 L of ethanol from sugar beetProducing 300 L of ethanol from potatoesProducing 400 L of ethanol from corn
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A ladder is leaning against a building. Match the values with their descriptions.(K is up Above the G )
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