3 years ago

I need help with my math test i took a screenshot of the question

Mathematics

1 answer:

Mekhanik [1.2K]3 years ago

7 0

Answer:

Step-by-step explanation:

2 + (-1) = 1

1 + 3 = 4

Thus, 5(small four)

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Ella grew 3 over 4 of an inch last year. Ben grew 2 over 3 of an inch last year. How much more did Ella grow than Ben last year?

IrinaK [193]

Answer:

Ella grew $\frac{1}{12}$ of an inch more

Step-by-step explanation:

For this problem, you want to subtract Ben's growth from Ella's.

This expression would be $\frac{3}{4}$ - $\frac{2}{3}$ .

To work these out, they must have the same denominator (which should be the lowest common multiple or LCM).

In this case, the LCM is 12, so you want to multiply each side so the denominator is 12. This means the first fraction should be multiplied by $\frac{3}{3}$ and the second by $\frac{4}{4}$ .

This makes the expression $\frac{9}{12}$ - $\frac{8}{12}$ , which equals $\frac{1}{12}$ .

**This content involves adding and subtracting fractions, which you may want to revise. I'm always happy to help!

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3 years ago

F(x) = 2x^2 - 3x, calculate f(x+h)-f(x) / h

kvasek [131]

First plug in (x+h) for x in the function.
f(x+h)= 2(x-h)^2-3(x-h) = 2(x^2-2xh+h^2)-3x-3h =
2x^2-4xh+2h^2-3x-3h - 2x^2 +3x =
(-4xh +2h^2-3h)/h
-4x +2h-3

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4 years ago

Anna drives 3.9 miles to work. Tanya drives 7.5 times farther to work than Anna drives.

nalin [4]

Answer:Tanya drives 11.4 miles farther.

Step-by-step explanation:

3.9+7.5=11.4 miles

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3 years ago

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Which law would you use to simplify the expression (x^4)^9

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