"The sum of r and 7" can be represented as r + 7
Answer:
The steps that can be done to both sides of the equation is: Add 9.6, then divide by 3.2
Step-by-step explanation:
Solve the equation:

-First you add both sides 9.6:


-Then, you divide both sides by 3.2:


Answer:
That equation doesn't make sense, so this equation means "no solution"
Step-by-step explanation:
X(x+3)-7(x+3)
x2+3x-7x-21
x^2-4x-21
3miles/ 28 minutes times 42 minutes is equal to 4.5 miles.
Therefore, Eric run 4.5 miles in 42 minutes.
Hopefully this helps!