X=56+4y
6x-6y=678
x-y=113
x=113+y
113+y= 56+4y
57=3y
y=19
x=132
Answer:
<h2>7y² - 6y -17</h2>
Step-by-step explanation:
(-2y^2-11y-7)-(-9y^2-5y+10) (firstly, we remove the brackets)
-2y^2 - 11y - 7 + 9y^2 + 5y - 10
= (-2y^2 + 9y^2) + (-11y + 5y) + (-7 - 10)
= (7y²) + (-6y) + (-17)
Answer:
.25 cents, per Party hat
Step-by-step explanation: