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4 years ago

Which equation can be used to find the two numbers whose ratio is 4 to 3 and that have a sum of 42?

Mathematics

1 answer:

Ivahew [28]4 years ago

8 0

4x+3x=42

7x=42

x=6

4(6)+3(6)=42

24+18= 42

42=42

I know it's too much but hope this helped :)

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tatiyna

Hello,

I dont care for points, Just glad to help! :D

And A slope iis only x*y=z. This mean's
That you will basically be dividing top from side (NOY BOTTOM)
and be multiplying those 2.

Hope this helps

3 0

3 years ago

Read 2 more answers

PLEASE SOMEONE HELP I TRULY DO NOT UNDERSTAND

IceJOKER [234]

Hi there!

$\large\boxed{f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} } }$

$f(x) = 9x^{3} - 4$

Find the inverse by replacing f(x) with y and swapping the x and y variables:

$x = 9y^{3} - 4$

Isolate y by adding 4 to both sides:

$x + 4 = 9y^{3}$

Divide both sides by 9:

$\frac{x+4}{9}= y^{3}$

Take the cube root of both sides:

$y = \sqrt[3]{\frac{x+4}{9} }\\\\f^{-1}(x) = \sqrt[3]{\frac{x+4}{9} }$

7 0

3 years ago

Express the repeating decimal 2.1¯ as a fraction. 21/10 20/9 19/9 19/8

Oliga [24]

Answer:

21/10

Step-by-step explanation:

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6 0

3 years ago

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Jody can swim one length of the pool in 3 4ths of a minute.how long will it take jody to swim six lengths of the pool

Ostrovityanka [42]

I believe that it is eight minutes

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3 years ago

A random sample of 84 students at a university showed an average age of 22 years and a sample standard deviation of 3 years. Fin

Debora [2.8K]

Answer:

The margin of error for the 94% confidence interval is 0.6154.

Step-by-step explanation:

The (1 - α)% confidence interval for population mean is:

$CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}$

The margin of error of this interval is:

$MOE=z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}$

The critical value of z for 94% confidence level is, z = 1.88.

Compute the margin of error for the 94% confidence interval as follows:

$MOE=z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}$

$=1.88\times\frac{3}{\sqrt{84}}\\\\=0.6154$

Thus, the margin of error for the 94% confidence interval is 0.6154.

7 0

3 years ago