How to tell if a math intersection is going to be a right angle?

Carrie buys 6.2 yards of blue fabric and 5.4 yards of red fabric. If the blue and red fabric costs the same amount per yard, and Carrie pays $58 for all of the fabrics, what is the cost per yard?

Mark shoveled 1/8 ton of gravel in 1/4 hour. What was his average rate of shoveling in tons per hour?

Decide if the following change is an increase or decrease. then determine the percent of change. 48 inches to 30 inches

Mia is finally able to upgrade her cellphone. The one she wants costs $220 but she is able to get it for 60% off. She has a coupon for an additional 10% off. How much does she pay for her phone?

Tom had 3 m of rope. He used 3/4 of the rope to tie a box. How many metres of rope did Tom use to tie the box?

Dan and Bob went to the carnival. Dan bought 3 ticket refills and a lunch for $10.35. Bob bought 2 ticket refills and the lunch for $8.35. SHOW YOUR WORK Write a system of equations. Use t for tickets and l for lunch.

There are 450 students at Jones Elementary School. Mrs. Reese wants to give each student 75 sheets of paper. How many sheets of paper does Mrs. Reese need to purchase?

How can a decimal be converted to percentage?

When you subtract one square number from the other the answer is 20. What are the two numbers?

Two angles form a linear pair. One angle measures 8 less than three times the other. Find the measures of the angles.