Solve the following system of equations:
2x + 3y = 40
-2x + 2y = 20
We can add these equations to get a new equation. Then we can solve for y:
0 + 5y = 60
5y = 60
y = 12
2x + 3y = 40, plug in y = 12 and solve for x:
2x + 36 = 40
2x = 4
x = 2
Choice A
Answer:
110
Step-by-step explanation:
Set hamburgers<em> </em>as <em>h,</em>
salted pretzels as <em>p</em>,
hot dogs as <em>d.</em>
h+p+d=144
(3.00)h+(2.25)p+(2.00)d=354.25
=>3h+2.25p+2d=354.25
we also know (2.00)d=82 => d=41
We make 3h+2.25p+2d=354.25 => 3h+2.25p=272.25
and h+p+d=144 => h+p=103
Set h=p-103
Substitution
3(p-103)+2.25p=272.25
3p-309+2.25p=272.25
(5.25)p=581.25
p=581.25/5.25=110.7142857
We round down =>110.
The answer is 9y+3
simplify:
5+9y-2
=5+9y+-2
combine like terms:
= (9y)+(5+-2)
= 9y+3
Hmmm it's linear since it's multipling by 3 each time
