A metallurgist needs to make 21 mg of an alloy containing 85% nickel. She is going to melt that 65% nickel with pure nickel. How much of each should she use?

Shawn open a new bank account with $250 he receive for his birthday. Each month after that Shawn will add $25 to his account. How much money will Shawn have at five months? How long will it take for Shawn to save $1000?

Marilyn purchased 3,000 shares of stock for 36.48 per share. She sold them for 49.20 per share. Express her capital gain to the nearest tenth of a percent

Kaitlin spent 2/3 of an hour on homework. Her sister, Judy, spent 1 1/2 times that amount. Explain why Judy's homework time is between 2/3 of an hour and 1/2 hour.

The first week at robs new job he spent 12.84, 9.50, 10.25, 4.99, 8.59 on lunch In the second week, he spent $3.00 more in total for the 5 lunches than the first week What is the increase in the mean for the second week compared to the first?

How do you find out what percent 10 is of 15

The Tennis Teams of Atlanta need to older tennis balla for the upcoming tournament. They will need 2,367 tennis balls. If each can hold 5 tennis balls, how Many will they purchase

42 is subtracted from 42% of a number. The result is 42. What is the number?

The temperature is changing every day by negative 7 over 18 degrees Fahrenheit. What will be the change in the temperature after 3 days?

The equation of the polynomial function is: f (x) = (x + (2 + i)) (x + (2 - i)) (x + 5) f (x) = (x - (2 + i)) (x - (2 - i)) (x - 5) f (x) = (x - (2 + i)) (x - (2 - i)) f (x) = (x + (2 + i)) (x - (2 - i)) (x - 5)

Andre owned a 1/4 acre lot. He wanted to construct a 120' x 80' tennis court on the lot. How many square feet will remain uncovered after he builds the tennis court?