Donnie has $5.10 in nickels, dimes, and quarters. he has an equal number of dimes and nickels, with the value of the quarters being $2.40 more than the total value of the dimes and nickels. how many dimes does he have?

The table above shows approximate conversions from gallons to liters. what is the value of x?

Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?