Write an equation to represent each problem. the sum of half a number and 5 is 9. what is the number?

Find the area of the triangle shown 3 by 6

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog