Answer:
x = -4 or 2
Step-by-step explanation:
-4x² + 10x − 40 = -9x²
First, move the x terms to one side and the constant to the other.
5x² + 10x = 40
Divide by the leading coefficient:
x² + 2x = 8
Take half of the b coefficient, square it, then add to both sides.
(2/2)² = 1
x² + 2x + 1 = 8 + 1
x² + 2x + 1 = 9
Factor the perfect square:
(x + 1)² = 9
Solve for x:
x + 1 = ±3
x = -1 ± 3
x = -4 or 2
Answer:
h = 2A / (b1 + b2)
Step-by-step explanation:
A = 1/2h (b1 + b2)
Divide both sides by 1/2 (b1 + b2)
h = A / 1/2 (b1 + b2)
h = 2A / (b1 + b2)
Answer:
Company B's offer is more cost effective
Step-by-step explanation:
Expected no. of repairs:
(0)(0.25) + (1)(0.32) + (2)(0.29) + (3)(0.14)
= 1.32
Cost A: 12.99 × 12 = $155.88
Cost B: 1.32 × 75 = $99
What do you mean by use a net? id help but i dont understand yer question
Answer: 1/5
Step-by-step explanation: You just subtract 4/5 from 1, or 5/5. And BOOM! you get 1/5.
