a chemist has two solutions of hci one has 40% conventration and the other has 25% concentration. how many liters of each solution must be fixed to obtain 66 liters of a 31% solution

Find the area of painting 80 inches by 60 inches

What is 28; 50% increase

Danica has laid so they form a rectangle with a perimeter of 18 inches. What is the difference between the greatest and least possible areas of the rectangle?

Arnold had three pieces of different colored strings that are all the same length. Arnold cut the blue string into 2 equal size lengths. he cut the red string into 3 equal-size length, and the green string into 6 equal-size.

Write the fractions is simplest form tell whether they are equivalent

The histogram below shows information about the hours students spent exercising in a week: A histogram is titled Weekly Exercise, the horizontal axis is labeled Hours of Exercise, and the vertical axis is labeled Students.

What is the rule for 24, 48, 72,

Eight more then the number Let n represent an unknown number

Yoku Is putting on sunscreen. He uses 2 ml to cover 50 cm² of his skin. He wants to know how many milliliters of sunscreen he needs to cover 325 cm² of the skin.

Find the measures of