Hector must complete 40 community service hours in order to graduate from the eighth grade. so far, he has completed 1/5 of his hours by working at a food bank and 10% of his hours volunteering at a hospital. which expression can hector use to calculate the number of community service hours he has left to complete? a) 40 (4/5) + 40 (0.9 b) 40 (1/5) +40(0.1) c) 40 (1/5 + 0.1) d) 40- ((40 x 1/5) + ( 0.1 x 40))

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?