X-2y=-4
3x+y=9

solve the simultaneous equation (find x & y)

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?