A plumber charges $25 for a service call plus $50 per hour of service. Write an equation for the cost, y, after x hours of service.
Unit Rate:
Y-Intercept:
Equation:

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?