90 juniors took different sat-ii tests. 40% more students took the chemistry test than took the history test, and 50% more students took the math test than took the chemistry test. how many students took each test?

Arectangular exercise mat has a perimeter of 36 feet the length of the mat is twich the width writeand solve an equation to determine the length in feet. of the mat then find the area in square feet of the mart

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.