In a chemical compound there are three parts zinc for every 16 parts copper by mass. A piece of the compound contains 320 g of copper. Write and solve an equation to determine the amount of zinc in the chemical compound.

What is 6.2 as a mixed number in simplest form?

jasmyn and her three friends went out for lunch. They decided to leave a 15% percent tip. The receipt showed a total of $42.98 before tax and tip. The sales tax rate in pleasantville is 8.75%.

A store buys an item for $28 and sells it for $35. What is the percent markup?

Which of the following is NOT equivalent to the rational expression: 4/3-x a. - 4/x-3 b. - 4/x-3 c. - 4/3-x

Adam rode his skateboard 3 3/4 miles in 3/4 of an hour. What was his average speed in miles per hour?

Chris's uncle has a model car. the model is 6 inches long and 3 inches wide. the actual car is 75 inches long. what is the car's actual width, if we assume the model's proportions are accurate? if necessary, round to the nearest tenth of an inch.

Justin's doctor said that the expression x+y+5/2, where x and y are his parents' current heights in inches, gives an estimate of how tall Justin will be as an adult. Justin's work evaluating the formula is shown below.

Which expressions are equivalent to 16x4 - 64? Check all that apply. 16x4 + 16x - 16x - 64 16x4 - 8x - 8x - 64 (4x2 + 8) (4x2 - 8) 16 (x2 + 2) (x2 - 2) 4 (4x4 - 8)

X + 2 = 6.3 What is the number to replace the variable x

Lathematics 1. There are 150 students in a college of whom 66 play basketball, 45 play cricket and 42 play soccer, 27 play exactly two of three sports & 3 play all of three sports, How many of 150 play none of 3 sports?