I seem to be getting my questions wrong or be going on the wrong trail. Can someone help me decode this?

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

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?