50p-40p+25-p
9p+25 is the answer.
Answer:

Step-by-step explanation:
First, make them on one side of the formula in the form of
which is 
Next, insert the corresponding number in the quadratic formula,
, and the answer can be calculated.
√214= 14.6287388383278
Calculator maybe??
Step-by-step explanation:
1)x is less than 7
2)x is greater than and equal to -4