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:
380.13
Step-by-step explanation:
area= (pi)x(r^2)
pi times r squared
The dude on top of me is correct
Answer:
the answer is 7
Step-by-step explanation:
plot the points then count how many spaces there are going diagnal
Due to m<2 is a corresponding angle to m<6, the answer to the question is 146°.
Answer: $4
The cost of an 8x10 piece is $2, and 16x20 is just 2 times that amount, multiply the cost.