A textbook store sold a combined total of 465 chemistry and physics textbooks in a week. The number of chemistry textbooks sold was 43 more than the number of physics textbooks sold. How many textbooks of each type were sold?

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?