John has 3 times as many quarters as dimes. he has the same amount of pennies as dimes. the value of the coins add up to $21.50. how many of each type of coins does he have

Solve the equation using any method 5x²-7x-6=0

What is the difference of the values of the first and third quartile of this data set {10, 9,6,12,4,6,7,8,15,14,12,9,10,5}

A three-dimensional model of Lucia's apartment is shown. To cool the whole apartment, an air conditioner must provide 2.5 BTUs per cubic foot. How many BTUs are needed to cool Lucia's apartment? 19,600 BTUs 19,800 BTUs 20,400 BTUs 24,000 BTUs

A letter of application is intended to?

50,000 is _ times as much as 500

4) 4n2 + 7n - 135 = 0

Of the 15-year-olds at a karate school, 6 have black belts and 20 have brown belts. Among the 16-year-olds, 5 have black belts and 9 have brown belts. Which age group has a higher ratio of black belts to brown belts?

What is 180 squared show your work

What is the range of y=2 to the power of x

How gay are you and why you are gy