Solve the following system by substitution. 22.
X + 2y = 0
-3-4=-2
4y = -2
A (2, -1)
B. (2, 1).
C. (4, -1)
D. (-2, -1)

Sherina wrote and solved the equation. x-56=230 x-56-56=230-56 x=174 what was sherina’s error? sherina’s work is correct. sherina only needed to subtract 56 from 230. sherina made a subtraction error when subtracting 56 from 230. sherina should have added 56 to both sides of the equation.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9