Answer:
-25
Step-by-step explanation:
(1) y = -2x²
(2) y = 2x² + k Subtract (1) from (2)
0 = 4x² + k Subtract 4x² from each side
k = -4x²
The parabolas are <em>symmetrical about the y-axis.</em>
Segment AB = 5, so x = +2.5 and x = +2.5.
k = -4(±2.5)² = -4 × 6.25 = -25
Start with

Multiply both sides by 3:

Recall that 21/5=4.2 to claim the correct answer.
Answer: she stopped to change a flat tire
Step-by-step explanation:
-7 and 1
Because if you do -7 plus 3 which equals -4 and the absolute value of negative 4 is 4. And 1+3 is 4