What is the result of adding these two equations?

4x - 4y = - 2

-9x - 4y = - 3

Many urban zoos are looking at ways to effectively handle animal waste. One zoo has installed a facility that will transform animal waste into electricity.

Step 2: 900 = 12x Divide both sides by 12 to figure out how many times Malcom would need to hop to travel to class.

An original piece of art work is 3 feet by 2.5 feet. a reprint of the artwork is 6 inches by 5 inches. are the pieces similar? if so, what is the ratio of their corresponding side lengths?

Prove that sin alpha * sin (90 - alpha) - cos (90-alpha) * cos alpha

A rectangular prism with a volume of 2 cubic units is filled with cubes with side lengths of 1/4 unit. How many 1/4 unit cubes does it take to fill the prism

robert wants to put lights around the edge of his deck. The deck is 43 feet long and 26 feet wide. How many yards of lights does he need?

If a computer costs $600.00 and the sales tax rate is 7.5 percent, what is the total cost of the computer?

What is 2/3 cup chopped nuts multiplied by 6?

Who is taller 180 cm or 5ft 8in.

Samantha's notebook has 14 pages more than three times as much as Lisa's notebook. If Samantha's notebook has 260 pages, how many pages are there in Lisa's notebook?