<span>To do that, you need to set it all to zero and factor:
x^2+8x+15 = 0
(x+5)(x+3) = 0
then put both those in parentheses chunks in their own equations
x + 5 = 0
x + 3 = 0
and then simplify
x = -5
x = -3
So the two points where the parabola crosses the x-axis are -5 and -3.</span>
1. 2.50x + 5 = C
2.50(4.1) + 5 = C
$15.25
2. 15.25(1.15)
$17.54
3 B, I believe but dont quote me.
4. 206 / 60 + 30
236 minutes
Answer:
50°
Step-by-step explanation:
180° - 130° = 50°
Mark my answer as the brainliest if this helped! :)
Minus
The quadratic equation is
( -b+-SQRT(b^2 - 4ac) )/2a
320 pounds of algea. After 4 hours, it would be 80, After 8 hours, 160. After 12 hours, 320
