Select the correct answer. What is the solution to this system of equations?
x-2y= 15
2x+4y=-18
Ο Α.
x= 1, y=-6
OB. x= 1, y=-7
OC. x= 3, y=-6
OD. x= 3, y=-7

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?