Why do two negative numbers multiplied equal a positive?

Select all the correct answers. An architect is designing a swimming pool with a base in the shape of a right triangle.

How many calories of energy will 20 grams of carbohydrates provide if 1 gram provides 4 calories?

The Mariana Trench in Pacific Ocean is about 36,201 feet deep the Puerto Rico trench in the Atlantic Ocean is about 27,493 feet deep draw a bar model to find how many feet deeper the Mariana Trench is than the Puerto Rico trench

Find the measure of one interior angle of the following polygon.

Dave and his sister picked out two pumpkin at the pumpkin patch. the pumpkins cost $0.47 per pound. david's pumpkin weighed 13.24 pounds and his sister's pumpkin weighed 10.6 pounds. how much did they pay for both pumpkins?

Megan, Sally and Tom share £180 in the ratio 1:3:2 how much more does Sally recieve than Megan?

What document do both men claim supports their position

What numbers multiply to make 9 but also add to make negative 10

How many halves are in four and eight tenths

Jennifer's mother buys her 2 new storybooks every 4 months. In how many months will Jennifer have a collection of 12 books