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3 years ago

If we know that u varies inversely as x and y =8 when x=15, what is y when x=10? What is the constant of variation?

1 answer:

4 0

The appropriate math model would be y = k/x.

Unsure of why you are using " u " here.

If y = 8 when x = 15, then 8 = k/15, and k = 120. This is the const. of var.

Then y = 120/x. If x = 10, y = 120/10 = 12.

Read more about equations at:

brainly.com/question/2972832

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<u>Complete question</u>

Solve for y

$-3 = 7\left(y-\dfrac97\right)$

5 0

2 years ago

The weights of cars passing over a bridge have a mean of 3,550 pounds and standard deviation of 870 pounds. Assume that the weig

Annette [7]

Answer:

0.24315

Step-by-step explanation:

Using the z score formula to solve this question

z = (x - μ) / σ,

Such that:

x = raw score

μ = population mean

σ = population standard deviation.

From the question:

x = 3000

μ = 3550

σ = 870

z = (3000 - 3550) / 870

z = -550/870

z = -0.6962

Using the z score table as well as probability calculator(as requested in the question to find the z score)

The probability of having less than 3000 is obtained as:

P(x<3000) = 0.24315

7 0

3 years ago

3b + 4 ≥ 7<br> what is b ?

Tasya [4]

This is just the answer digitally i cant explain the process

3 0

3 years ago

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Peter leaves Mitchell's house traveling 30 mph. Mitchell leaves 15 min later, trying to catch up to peter, going 40 mph, if they

Kruka [31]

Given :

Peter velocity , P = 30 mph .

Mitchell velocity , M = 40 mph .

Mitchell leaves 15 min later .

To Find :

If they drive along the same route how long will it take Mitchell to catch Peter.

Solution :

Distance covered by Peter in 15 min .

$D = 30\times \dfrac{15}{60}=7.5\ miles$

Let , time taken is x .

So , distance covered b them is equal :

$7.5+30\times x=40\times x\\\\x=\dfrac{7.5}{10}=0.75\ hours\\\\x=0.75\times 60\ min\\\\x=45\ min$

Therefore , time taken by them is 45 minutes .

Hence , this is the required solution .

4 0

3 years ago

A circular plate has a radius of 13 cm.

Korvikt [17]

A=pir^2
a=pi13^2
a=169pi
a=530.66 square cm

3 0

2 years ago

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