A group of students take a test. The group consists of 12 boys and 8 girls.

The mean mark for the boys is 18

The mean mark for the girls is 16.5

Calculate the mean mark for the whole group.

State the property that justifies the following:120+0=120

A bag contains 20 marbles of which 4 are red what is the probability that a randomly selected marble will be red

The vertex of a parabola can be: a. Always a minimum c. Either a minimum or a maximum b. Always a maximum d. Both a minimum and a maximus

Each sides of the box is 4 in what is the volume of the box

Five more than the product of a number and 2 equals 8

A collector's model racecar is scaled so that 1 inch on the model equals 6 feet on the actual car. If the model is 0.75 inches high, how many feet high is the actual car? Enter your answer as a decimal.

What is 5) 47 and the remander

You are suppose to subtract 63 from 2.453

What is 18 minus 4 to the power of 2 plus 5 times 2 in simplest form

How do you factor this equation? -x²-14x-49