Answer:
I believe that Kevin is 6 years old now.
Step-by-step explanation:
I used the guess and check method to figure this out.
First, I began by making Daniel 1 years old, two years ago. Kevin was 4 times as old as Daniel two years ago, so he would be 4 at the time. Now, Daniel would be 3 and Kevin would be 6 years old. The statement that Kevin is three years older than Daniel would confirm this, because 6-3=3. Hope this helps, this is my first time answering:)
Answer:
Step 2
Step-by-step explanation:
Michelle's step in trying to solve the equation is given below:
Michelle made a mistake in Step 2.
The right hand side of Step 1: 
Rather, the correct sum is:
Add 5 to 5, or multiple 5 by 2.
Answer:
-ab/1
Step-by-step explanation:
The multiplicative inverse of x/y is y/x, because when multiplied it equals 1.
x/y time y/x = xy/xy, which equals one.
In this case, -1/ab times -ab/1 = -1ab/-1ab, which equals one.
Answer:
A)
Step-by-step explanation:
I used an Algebra app :) it is correct.
