I'm assuming the given function is f(x) = 15x^2 + 10x.

If so, then,

f(x) = 15x^2 + 10x
f(x) = 15*(x)^2 + 10*(x)
f(-1) = 15*(-1)^2 + 10*(-1) ... note how x is replaced with -1
f(-1) = 15*(1) + 10*(-1)
f(-1) = 15 - 10
f(-1) = 5

Therefore the answer is 5

7 0

3 years ago

5/16t=-9

Svetradugi [14.3K]

I'm going to assume that the equation is $\frac{5}{16}t = -9$ where the 't' is not in the denominator

If that assumption is correct, then we do two things to solve for t. First, we multiply both sides by 16. This undoes the division of 16 on the left side

$\frac{5}{16}t = -9$

$16*\frac{5}{16}t = 16*(-9)$

$5t = -144$

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Then we divide both sides by 5 to undo the multiplication of 5 (note: 5t means 5*t or "5 times t")

$5t = -144$

$\frac{5t}{5} = \frac{-144}{5}$

$t = -\frac{144}{5}$

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So here's what all the steps look like:

$\frac{5}{16}t = -9$

$16*\frac{5}{16}t = 16*(-9)$

$5t = -144$

$\frac{5t}{5} = \frac{-144}{5}$

$t = -\frac{144}{5}$

note: -144/5 converts to the decimal value of -28.8 so t = -144/5 is the same as t = -28.8

3 0

4 years ago

5/12 x 16 2/3 Im lazy :p thank you for helping though

polet [3.4K]

The answer is 125/18. decimal form would be 6.94 (repeating) lol

3 0

4 years ago

-5x+5y=10 3x-3y= -10

strojnjashka [21]

Answer:

ummmm math?

Step-by-step explanation:

7 0

3 years ago