How do i do standard form with variables and things? ?

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss