I believe the answer is 78.54 , D
Answer: Choice B)
2x+5(2x+3) = 3
============================================
Reasoning:
We start with the second equation 2x+5y = 3
Since y = 2x+3 from the first equation, we can replace every copy of y with (2x+3). This replacement is valid because y and 2x+3 are the same.
So that's how we go from 2x+5y = 3 to 2x+5(2x+3) = 3
This replacement is done to get rid of the y variable, and it allows us to solve for x later on.
Answer:
the second one
Step-by-step explanation:
Hi there! To find the answer, we need to try out the numbers. 3 * -3 is -9 + 0 is -9. -9 < -8. A is out. 3 * -2 is -6 + -1 = -7. -7 > -8. B works. Score! But wait. 3 * 0 is 0 + 10 is -10. -10 < -8. C is out. 3 * 2 is 6 + -16 is -10. -10 < -8. The answer is B: (-2, -1).
Velocity=-32t+440
At maximum height, v=0
0=-32t+440
-440=-32t
t=13.75 seconds
