Write an equation of a line in slope-intercept form with the given slope and y-intercept. slope: -2, y-intercept: 7

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.