Answer:
-3c
Step-by-step explanation:
The given expression is:

We need to simplify this expression. The rational expression in the denominator can be multiplied to numerator by taking its reciprocal as shown below:

Thus, the given expression in simplified form is equal to -3c
Answer:
Porpotional
Step-by-step explanation:
because it is non proportional
Combine like terms the variables first. 4b-15b=-11b
-7+3=-4
-11b-4
Answer:
he will dig for 15 hours
Step-by-step explanation:
if a miner digs —90 feets in 6 hours
then he will dig –225 feet in x hours
—225 feet x 6 hours /—90 feet = 15 hours
H=4. Solving the equation gives you two answers, 4 and -0.5 and since you can't logically have negative height, 4 is the only legitimate answer that is realistic.