3 years ago

Find f(-3) for the function f(x)=x^2-8x

Mathematics

2 answers:

abruzzese [7]3 years ago

5 0

Answer:

substitute x= -3

f (-3)=9+24

=33

Andrei [34K]3 years ago

5 0

Answer:

f(-3)=33

Step-by-step explanation:

Substitute -3 in for both x's

f(x)=x^2-8x

f(-3)=(-3^2)-8(-3)

f(-3)=(9)+24

f(-3)=33

Hope this helps! :)

You might be interested in

Given the function h(x)=-x^2+4x+12, determine the average rate of change of the function over the interval −2≤x≤4.

iris [78.8K]

Answer:

Step-by-step explanation:

The average rate of change of h(x) in the closed interval [ a, b ] is

$\frac{f(b) - f(a)}{b-a}$

Here [ a, b ] = [ - 2, 4 ] , then

f(b) = f(4) = - (4)² + 4(4) + 12 = - 16 + 16 + 12 = 12

f(a) = f(- 2) = - (- 2)² + 4(- 2) + 12 = - 4 - 8 + 12 = 0

Then

average rate of change = $\frac{12-0}{4-(-2)}$ = $\frac{12}{6}$ = 2

5 0

3 years ago

35% of 15 is what number

kiruha [24]

Answer: 5.25

Step-by-step explanation: .35*15=5.25

5 0

3 years ago

Read 2 more answers

Lisa says 12 3 = 9 Kay says 12 3 = 4 Who is correct? Why?

stellarik [79]

Kay is correct because if you take 3 4s and add them all together you get 12 and if you take 4 3s and add them together you get 12

8 0

4 years ago

In a race in which twelve automobiles are entered and there are no ties, in how many ways can the first three finishers come i

k0ka [10]

That is 3 slots
12 in 1st slot
11 in 2nd
10 in 3rd

so that is 12*11*10 or 1320 ways

3 0

3 years ago

Read 2 more answers

What’s the area of the triangle?

arsen [322]

Answer:

135

Step-by-step explanation:

A=1/2(b•h) so,

18x15=270

270/2 =135

7 0

3 years ago

Read 2 more answers