Help! 5x + 6y = 18

2x - 3y = 12

As a first step in solving the system shown, Yumiko multiplies both sides of the equation 2x − 3y = 12 by 6.

By what factor should she multiply both sides of the other equation so she can add the equations and eliminate a variable?

What one-variable equation is she left with after adding?

What percent of the circle below is shaded?

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.