Answer: C) The student made an error in step 3.
Step-by-step explanation:
When dividing by a negative while working with inequalities, you must "flip the sign." Thus, there is an error in step 3.
N.B. The answer could very well be interpreted as B), but I believe C) is the best and most defensible answer.
Hope it helps :) and let me know if you want me to elaborate.
1. We are given:

The only a which squared gives you 64 is 8. The perimeter of an 8 by 8 square will be 32. Half of that is 16. Now, let's see what we can do. We can set up:

Obviously, each side length has to be 4. So, the area of this square will be
16 units².
2. Let n equal her son's age. So, her age right now will be (S = her age):

1 year ago it was:

We have 2 equations, let's substitute. We can rewrite this as:

Solve for n:


We know the value of n, which is her son's age. So, her son is
1/15 of a year old or about 24 days old.
Answer:
(a).
=
Step-by-step explanation:
A =
=
=
It is not because a right triangle needs one right angle, and a right angle is 90 degrees
Step-by-step explanation:
You are correct. 4 is the slope and 2 is the y intercept.
Reasoning:
y = mx + b is the slope intercept form of a line
m stands for slope
b stands for y intercept
In your case, m = 4 and b = 2.