Answer:
Step-by-step explanation:
Δ = 
VΔ = 4 * 8 = 32
a = (- 4 ± 32) * 
a' = 7/2
a''= 9/2
Answer:
D
Step-by-step explanation:
f(x) = 3x^2 - 2x + 5
f(-2) means that wherever you see an x on the right, you put in the value of -2 for the x.
f(-2) = 3(-2)^2 - 2(-2) + 5
f(-2) = 3(4) + 4 + 5
f(-2) = 12 + 9
f(-2) = 21
The answer is D
Answer:
original cost = 38.11
after<u> 10% discount</u> price will be 34.30
decrease percentage is 10%
and nearest percent is 10
Step-by-step explanation:
Answer:
150
Step-by-step explanation:
Angle A= angle b
8x-10=3x+90
5x=100
x=20
Angle B=150
Answer:
8 Books
Step-by-step explanation:
First find how many she had before buying 8 more-
12 - 8 = 4
Then multiply that by 2
4 x 2 = 8
The had 8 books to begin with
