Solve by using substitution. Express your answer as an ordered pair. -5x+4y = -19 1x + 2y = 15

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project