Answer:
Step-by-step explanation:
h is the height of the pebble after a certain amount of time has gone by. Since we are told to find that time when the pebble is on the ground, we say that h = 0 since the height of something on the ground has no height at all. Then factor the quadratic.

Throw that into the quadratic formula or however you were taught to factor irrational quadratics (maybe completing the square?) to get that
t = 11.27869 sec and t = -10.52869 sec
Since we all know that time will never carry a negative value, we will disregard it and go with 11.27869 seconds. Not sure to where you are told to round.
Answer:

Step-by-step explanation:
We are given the following in the question:
Controller cost = $135
System cost = $2.50 per foot of pipeline
The total cost depends upon the length of Pole.
Let the system requires F feet of pipeline.
Total cost will be given by the equation:

is the required expression for total cost
F: feet of pipeline required
c(F): Total cost of installation
Answer:
x=4
Step-by-step explanation:
Because we know that PQ = RS, we can use the transitive property to replace PQ in the first equation with 29:
9x-7=29
1) Add 7 to both sides:
9x=36
2) divide by 9 on both sides:
x=4
Answer:
I.dk but you need to focus on something school related for a bit
Step-by-step explanation:
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rate = distance / time Ok, part a is correct, try writing the answer as 2/5
rate = 2/5 = 0.4 in/s
rate = 0.4 in/s
Hi, I'm here is just that the pictures are small, I'm trying to read them
b)
Please upload a picture of part b like the last picture you sent of part a
2/5 = x/ 15
x = 15 x 2 / 5
x = 30/5
x = 6 inches
The result is 6