Answer:
There are 1.75 quarts in a cup.
Step-by-step explanation:
9514 1404 393
Answer:
- 320 m after 8 seconds
- 5.6 seconds, 10.4 seconds to height of 290 m
Step-by-step explanation:
To find the height at 8 seconds, evaluate the formula for t=8.
S(t) = -5t^2 +80t
S(8) = -5(8^2) +80(8) = -320 +640 = 320
The height of the rocket is 320 meters 8 seconds after takeoff.
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To find the time to 290 meters height, solve ...
S(t) = 290
290 = -5t^2 +80t
-58 = t^2 -16t . . . . . . . divide by -5
6 = t^2 -16t +64 . . . . . complete the square by adding 64
±√6 = t -8 . . . . . . . . . take the square root
t = 8 ±√6 ≈ {5.551, 10.449}
The rocket is at 290 meters height after 5.6 seconds and again after 10.4 seconds.
Answer:
y=5x-9
Step-by-step explanation:
<u>Step 1</u>
You are trying to get y by itself on one side, so you subtract 5x to both sides and you are left with -y=-5x+9
<u>Step 2</u>
You don't want your y to be negative (-y) and there's an imaginary -1 there so in order to make that positive you have to multiply by another -1 to both sides because a negative multiplied by a negative is a positive. Then you are left with y=5x-9 because each of those numbers were also multiplied by -1. And that's your answer!
Hope this helped
Answer:
28/7
Step-by-step explanation: