When a number is decreased by 10% of itself, the result is 171. what is the number?

Oliver had $50 on the day before his birthday. after he recived some money for his birthday , he had $75. write and solve eqaution to find how much money oliver received for his birthday. x+50=75

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?

You estimate that a baby bird weighs 2 pounds. the actual weight of the baby bird is 1.5 pounds. find the percent error. round your answer to the nearest hundredth of a percent.