20. Simplify this expression: 13 + (-12) - (-5) = ?

O A. 6

O B.-6

O C.-30

O D. 30

If 8a-4b=20 and 4a-8b=4, then what is the value of a-b?

This equation: (y-3) ^2=4y-12

How to convert 1,025 to expanded notation?

The expression - 7y is a term constant variable

Which of these story problem describes the sum 19 + (-12) ? Check all that apply. Show your work to justify your answer.

Two more than a certain number is 15 less than twice the number

Mario walks his dog once every 8 days in the park, while todd walks his dog once every 14 days. today, both mario and todd walked their dogs in the park. in how many more days will both boys walk their dogs in the park on the same day?

the sum of three numbers is 81. the second number is twice the first, and the third number is six more than the second. find the number

Your research frm has found that salanies for coffee shop baristas have a normal distrbution with a mean of $16. 164 per year and a standard deviation of $1,459.

The Martins swimming pool is a square and is in the center of a plot that is 36 meters on a side. They have 1152 square meters of lawn. How long is a side of the pool?