Answer:
Step-by-step explanation:
Is this the entire question? Some of it makes no sense without a diagram or something.
To get rid of A you actually have to solve the equation.
7h – 5(3h – 8) = –72 Remove the brackets
7h - 15h + 40 = - 72 Combine the like terms
- 8h + 40 = - 72 Subtract 40 from both sides
- 8h = -112 Divide by -8
h = 14
Well the depth is a whole number so A is true.
We don't know anything about time. But the answer is positive.
C is false because B is true.
We don't know exactly what the depth of the well is.
I would pick A, but you need the entire question.
Answer:
P * 300000 = 30
.01%
Step-by-step explanation:
Let P equal the percent. Of means multiply and is means equals
We need to make sure the units are the same. I will convert km to cm
3 km *1000m/1km * 100cm/1m =300000 cm
Now we can write the equation
P * 300000 = 30
Divide each side by 300000
P 300000/300000 = 30/300000
P =.0001
Changing this from decimal to percent
P = .0001*100 = .01 %
