Answer:

Step-by-step explanation:
Given

Required
Determine the solution
Since b is a perfect square, the equation can be expressed as:

Apply difference of two squares:

Split:

Remove brackets:

Make a the subject in both equations

The solution can be represented as:

Answer:68.27%
Step-by-step explanation:
TI84
2nd distr
normalcdf(89,97,93,4)
Answer:
(-1,2)
Step-by-step explanation:
The solutions to the system is where the lines intersect
The lines intersect at the point (-1,2)
Answer:
c=15
Step-by-step explanation:
5 dogs --------- 3 cats
25 dogs---------c cats
c=(25x3)/5
=75/5
=15 cats