Answer:
k = -9
Step-by-step explanation:
f(x) = 2x²+kx-20
From remainder theorem,
x = 10 and f(10) = 90
f(10) = 90
Subsitute the value of x into the expression above.
f(10) = 2(10²)+10k-20 = 90
200+10k-20 = 90
Solve for k by collecting like terms
10 k = 90+20-200
10k = 110-200
10k = -90
k = -90/10
k = -9.
Hence the value of the constant is -9
Answer:
Step-by-step explanation:
X +4=
8x=32
Answer:
2/9^8
Step-by-step explanation:
3^0 = 1 so it turns into 9^-8/ 2^-1
Then put 9^-8 on the bottom to make it positive
Now its 1/9^8 & 2^-1
Then put 2 on top to make it positive and 2^1 is just 2
So now you have 2/9^8
I think it’s C but I’m not to sure but it’s the best