Rosa budgets her allowance so she uses equal amounts for spending, saving, and gifts. Her weekly allowance is $6.75. How much does Rosa save each week?

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.

What is the value of x in the following equation? -3x-2=2x+8

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?