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2 years ago

8

Zhang, who is z years old, is 5 years younger than Robert. The sum of their ages is 39. What are their ages?Write an equation. S

olve.

1 answer:

Soloha48 [4]2 years ago

5 0

Answer:

Zhang: 17, Robert: 22

Step-by-step explanation:

Robert's age would be z+5, 2×z+5=39, z=17 So Zhang's age would be 17, and Robert's would be 22

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2 years ago

Read 2 more answers

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sergejj [24]

Answer:

<h2> $( f - g)(x) = \frac{2x - \sqrt{x} + 14 }{3x}$ </h2>

Step-by-step explanation:

$f(x) = \frac{2x + 6}{3x} \\ \\ g(x) = \frac{ \sqrt{x} - 8}{3x}$

To find ( f - g)(x) , subtract g(x) from f(x)

That's

$( f - g)(x) = \frac{2x + 6}{3x} - \frac{ \sqrt{x} - 8}{3x}$

Since they have a common denominator that's 3x we can subtract them directly

That's

$\frac{2x + 6}{3x} - \frac{ \sqrt{x} - 8}{3x} = \frac{2x + 6 - ( \sqrt{x} - 8) }{3x} \\ = \frac{2x + 6 - \sqrt{x} + 8 }{3x} \\ = \frac{2x - \sqrt{x} + 6 + 8 }{3x}$

We have the final answer as

<h3> $( f - g)(x) = \frac{2x - \sqrt{x} + 14 }{3x}$ </h3>

Hope this helps you

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3 years ago