Vlad tried to solve an equation step by step. \qquad\begin{aligned} -8p+14&=42 \\ -8p&=28&\green{\text{Step } 1} \\ p&=-3.5&\blue{\text{Step } 2} \end{aligned} −8p+14 −8p p =42 =28 =−3.5 Step 1 Step 2 Find Vlad's mistake.

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup