Answer:
The answer is C.
Step-by-step explanation:
The first one, the fourth one, and the fifth one.
Answer:
He would look at 3 sites in 20 minutes.
Step-by-step explanation:
Answer:
a = 3, b = - 7
Step-by-step explanation:
Substitute x = 2 into the equation and equate to 5, that is
a(2)² + b = 5
4a + b = 5 → (1)
Substitute x = 3 into the equation and equate to 20
a(3)² + b = 20
9a + b = 20 → (2)
Subtract (1) from (2) term by term to eliminate b
(9a - 4a) + (b - b) = (20 - 5), that is
5a = 15 ( divide both sides by 5 )
a = 3
Substitute a = 3 into either of the 2 equations and solve for b
Substituting in (1)
4(3) + b = 5
12 + b = 5 ( subtract 12 from both sides )
b = - 7
So let's add all the common numbers together first:
14x^2 + 6x + 8
If you wanted it to be factored:
2(7x^2 + 3x + 4)
