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3 years ago

Help me pretty please. I have 2 questions.

Mathematics

2 answers:

tatiyna3 years ago

6 0

Ok first one since they have like terms in the denominator just cancel those and you will be left with x^2=9, now subtract 9 from both side to get x^2-9=0 now find the common factors.. we need to find a number that is the same and can be multiplied to get -9 and added and subtracted to eliminate it.. 3 times -3 gives you -9 and if you add or subtract them they eliminate themselves.. so our factors will be (x-3)(x+3) now set each set equal to zero to get the final answer of x. x-3=0 add 3 to both sides to get x=3 now with x+3=0 subtract 3 from both sides and you will get x=-3 so our both sets of number for x are 3,-3 so your answer for the first one is the second option.

for the second I am stuck I don't understand sorry!!!

juin [17]3 years ago

4 0

I believe that the second answer is c -5, 3.

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Step-by-step explanation:

Given:

f(x) = -x-7

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f(g(x))

Solution:

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3 years ago

An aquarium is being filled at a rate of 2.5 inches per second. The equationLaTeX: y=2.5xy = 2.5 x is used to determine the heig

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Step-by-step explanation:

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Kurt has a collection of 155 United States and Canadian stamps. He has 1.5 times as many United States stamps as Canadian stamps

stealth61 [152]

Kurt has 93 United States stamps in his collection

Step-by-step explanation:

The given is:

Kurt has a collection of 155 United States and Canadian stamps
He has 1.5 times as many United States stamps as Canadian stamps

We need to find how many United States stamps Kurt has in his collection

Assume that kart has x Canadian stamps

∵ kart has x Canadian stamps

∵ He has 1.5 times as many United States stamps as Canadian stamps

- That means the number of United States stamps is 1.5 times

the number of the Canadian stamps

∴ The number of the United States stamps = 1.5 x

∵ Kurt has a collection of 155 United States and Canadian stamps

- Add the two numbers of stamps and equate the answer by 155

∴ x + 1.5 x = 155

- Add like terms

∴ 2.5 x = 155

- Divide both sides by 2.5

∴ x = 62

∵ The number of United States stamps = 1.5 x

∴ The number of United States stamps = 1.5(62)

∴ The number of United States stamps = 93 stamps

Kurt has 93 United States stamps in his collection

Learn more:

You can earn more about the simple equation in brainly.com/question/11306893

#LearnwithBrainly

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3 years ago

If the average(arithmetic mean) of 5 and r is 7 and the average of 3 and s is 3 , what is the average of r and s?

Norma-Jean [14]

Answer:

Step-by-step explanation:

Calculate the values of both r and s, that is

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and

$\frac{3+s}{2}$ = 3 ( multiply both sides by 2 )

3 + s = 6 ( subtract 3 from both sides )

s = 3

Hence

$\frac{9+3}{2}$ = $\frac{12}{2}$ = 6 → C

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4 years ago