Given the function f(x) = -2x2 + 4x - 7, find f(-4).
-55
-7
25
2 answers:
Answer:
f(-4)= -55
Step-by-step explanation:
We want to find f(x), or y, when x is equal to -4.
Therefore, we can substitute -4 in for x in the function.
f(x) = -2x^2 + 4x - 7
Substitute -4 in for x
f(-4) = -2(-4^2) + 4(-4) - 7
Evaluate the exponent
f(-4)=-2(16)+4(-4)-7
Multiply -2 and 16
f(-4)= -32+4(-4)-7
Multiply 4 and -4
f(-4)=-32-16-7
Subtract
f(-4)=-55
-2(-4)2+4(-4)-7
16-16-7
-7. -7 is correct
You might be interested in
Answer:
x = -4
Step-by-step explanation:
Lets work on this :D
(6x × 2) - 18x = 24
=>12x - 18x = 24
=> -6x = 24
=> x = -4
Please give me brainliest if this helped! :D
Answer:
jdjdjdjd
Step-by-step explanation:
9999999
Answer:
Between 30 and 31
Step-by-step explanation:
Can't see all the options.
However, I'll guess and suggest B.
Not sure if this helped at all :P
Answer:
See below
Step-by-step explanation:
<u>X Y</u>
1 4
2 7
3 10
3(x - 1) + 4
10 triangles would be
3(10 - 1) + 4=
30 - 3 + 4 = 31
