2 years ago

If f(x) = -x2 + 6x, what is f(-3)?

Mathematics

1 answer:

Sever21 [200]2 years ago

8 0

Answer:

-12

Step-by-step explanation:

f(-3)= -(-3)2 + 6(-3)

= -(-6) -18

= 6 - 18

= - 12

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The area of a triangle is 30 square feet. If<br> the base is 4 feet, then what is the height?

ExtremeBDS [4]

Height=15

Explanation:
Area of a triangle= 1/2base x height
Plug in information
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What is the measurement of angle x (in degrees)? <br><br> Explain how you got your answer.

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Step-by-step explanation:

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Write an expression for the eighth partial sum of the series using summation notation

balandron [24]

Answer:

option B

Step-by-step explanation:

9/10 + 6/5 + 3/2...........

We find the difference between the terms

$\frac{6}{5} - \frac{9}{10}$

$\frac{12}{10} - \frac{9}{10} = \frac{3}{10}$

We will get the same difference when we subtract consecutive terms.

so , d= 3/10, a= 9/10

we find the formula for nth term

a_n = a+(n-1) d

$a_n = \frac{9}{10} + (n-1)\frac{3}{10}$

$a_n = \frac{9}{10} +\frac{3}{10}n-\frac{3}{10}$

$a_n = \frac{6}{10} +\frac{3}{10}n$

$a_n = \frac{3}{5} +\frac{3}{10}n$

we need to find eighth partial sum so we take n=1 to 8

sum of 8 terms ( $\frac{3}{5} +\frac{3}{10}n$ )

So option B is correct

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2 years ago

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AURORKA [14]

The answer is B ,,,,

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2 years ago