Answer:
6
Step-by-step explanation:
Set h to 640 and solve for t:
640 = -490t^2 + 1120t
Subtract 640 from both sides:
-490t^2 + 1120t - 640 = 0
The formula to solve a quadratic equation is:
x = -b -/+ sqrtroot (b^2-4ac)/(2a) where a = -490, b = 1120 and c = -640
Solve:
x = -1120 -/+ sqrtroot (1120^2-4(-490)(-640) )/ 2(-490)
x = 8/7 = 1.1428 = 1.14
Time was 1.14 seconds
Answer:
12.5 leters
Step-by-step explanation:
If you take the 4 liters she used to cover 50 doors,
Answer:
D
Step-by-step explanation:
Suppose she only fills her big pots. The number of big pots filled is 120÷12=10. So the y-intercept is (0,10).
Now suppose she only fills her small pots. The number of small pots filled is 120÷5=24. So the x-intercept is (24,0)
Answer:
The answer is <u>8</u>.
Step-by-step explanation:
Given:
4d - 35= -3.
Now, the solution:
![4d-35=-3](https://tex.z-dn.net/?f=4d-35%3D-3)
Adding both sides by 35 we get:
![4d=-3+35](https://tex.z-dn.net/?f=4d%3D-3%2B35)
![4d=32](https://tex.z-dn.net/?f=4d%3D32)
Dividing both sides by 4 we get:
![d=8](https://tex.z-dn.net/?f=d%3D8)
Therefore, the answer is 8.