You need to mix a solution that is 70% anti-freeze with one that is 30% anti-freeze to obtain 20 L of a mixture that 60% anti-freeze. How many liters of each of the solutions must be used?

The four-digit numeral 3AA1 is divisible by 9. What digit does A represent?

If X = 3 centimeters, Y = 4 centimeters, and Z = 5 centimeters, what is the area of the object?

at 1:00 pm the water level in a pool was 13 inches at 1:30 pm the water level is 18 inches at 2:30 pm the water level is 28 inches. what is the constant rate of change

Last week, Lindsay earned $10 per hour plus a $60 bonus for good job performance. She spends 1/15 of her paycheck on dinner with friends. If she had not earned the bonus, the amount she spent on dinner would have been 1/10 of her paycheck.

The cruising speed of of kennedy's boat is 20 mi/h and she plans to cruise at this speed for 80 miles, plus or minus 10 miles. What will be the minimum and maximum time that she will travel now?

P=q + 5 2p + 3p = - 20 linear equations

If the mean weight of 3 outfielders on the baseball team is 194 lb and the mean weight of the 6 other players is 229 lb, what is the mean weight of the 9 -person team?

6x+3y=15 what is the ordered pair of the solution

Question: If each girl used one marshmallow per smore how many marshmallows were used in all? Show your work.

A woman plans to use one fourth of a 48 foot x 100 foot rectangular backyard to plant garden. Find the perimeter of the garden if the length is 40 feet greater than the width