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Which triangle must be a right and why

The amount of flour needed to bake a cake is directly proportional to the size of the cake. If it takes 2 cups of flour to bake an 8 inch cake, how many cups of flour is needed for a 12 inch cake?

Emily convinced her mom to buy a giant box of her favorite cereal. Her mom doesn't think the box will fit on their shelf. The volume of the box is 10{,}00010,00010, comma, 000 cm^3 3 cubed. The base of the box is 252525 cm by 101010 cm

Cheryl moves houses. Her old house is 3 kilometers from her new house. How many meters is it from the old house to the new house? 3 meters 30 meters 300 meters 3,000 meters

What is (-5/8) x (2/3) ?

Working together, 6 friends pick 14 and 2/5 pounds of pecans at a pecan farm. They divide the pecans equally among themselves. How many pounds does each friend get?

One angle of a triangle exceeds another by 2 degrees. The sum of these 2 angles exceeds the third angle by 28 degrees. How large is each angle?

Jared is creating a flower garden in the shape of a triangle. which could be the dimensions of the garden in feet.

What do you add to 2 2/9 to make 4

17. Solve 2⁄3 + 5⁄6 and put answer in simplest form.