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4 years ago

Please help my slow behind ASAP

Mathematics

1 answer:

barxatty [35]4 years ago

4 0

The answer is D. The grand total for 12th graders is 68. Divide the 28 students in 12th grade who prefer math by the grand total to get you a rounded answer of 0.412.

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Solving for x thank youu

Svetach [21]

Answer:

sqrt (90)

Step-by-step explanation:

(13+5) is to z as z is to 5

(13+5) / z = z/5

18/z = z/5

90 = z^2

z = sqrt (90)

5 0

2 years ago

Riding a bike a person takes 20 minutes to go to work. The trip back home takes 30 minutes. If the rate back is 8 mph slower tha

Ghella [55]

<h2>Answer:</h2>

Trip to work has rate: 24 mph

Trip back to home has rate: 18 mph

Distance to work is: 480 m

<h2>Step-by-step explanation:</h2>

We know that speed is defined as the ratio of distance to time.

i.e.

$Speed=\dfrac{Distance}{Time}$

Let the distance traveled to work be: x m.

Now, while going to work it takes a person 20 minutes.

This means that the speed of the person while going to work is:

$S_1=\dfrac{x}{20}$

Also, the time taken to come back home is: 30 minutes.

This means that the speed of person while riding to home is:

$S_2=\dfrac{x}{30}$

Also, it is given that the rate back is 8 mph slower than the trip to work.

This means that:

$S_1-S_2=8$

i.e.

$\dfrac{x}{20}-\dfrac{x}{30}=8\\\\i.e.\\\\\dfrac{30x-20x}{600}=8\\\\i.e.\\\\\dfrac{10x}{600}=8\\\\i.e.\\\\\dfrac{x}{60}=8\\\\i.e.\\\\x=480\ \text{m}$

Hence, the distance to work is: 480 m.

Also, the rate while going to work is:

$=\dfrac{480}{20}\\\\=24\ \text{mph}$

and the trip back to home is covered with the speed:

$=\dfrac{480}{30}\\\\=16\ \text{mph}$

6 0

3 years ago

what is the solution to (3 x 10^2) x (5 x 10^5) written in scientific notation?A: 1.5x10^8B: 16x10^8c: 1.5x10^7D: 15x10^7

Ne4ueva [31]

Multiplying gives us 3 x 5 = 15

10^2 x 10^5 = 10^7

So we get 15 x 10^7. However, we need to move the decimal point from 15.0 to 1.5:

1.5 x 10^8. The answer is A.

6 0

3 years ago

What is the area of the figure

yarga [219]

Answer: 35 square feet

Step-by-step explanation:

3 0

4 years ago

55% of 387 is what number

Sav [38]

The answer is 212.85

Hope it helps.

5 0

4 years ago

Read 2 more answers