Hey there! :)
Answer:
$96 spent.
Step-by-step explanation:
Set up a proportion to determine the amount spend for 72 sheets. Express it in sheets/amount spent:
Cross multiply:
6 · x = 8 · 72
6x = 576
Divide:
x = $96 spent for 72 sheets.
5x+7y=25
5x-2y=-65
subtract both of the equations
5x-5x=0
7y--2y= 7y+2y=9y
25--65=25+65=90
0+9y=90
9y=90
divide both sides by 9 to get y by itself
9y/9=90/9
cross out 9 and 9 which becomes 1*1*y=y
90/9=10
y=10
find x by using the substitution method
5x+7y=25
5x+7(10)=25
5x+70=25
move +70 to the other side
sign changes from +70 to -70
5x+70-70=25-70
5x=-45
divide both sides by 5 to get x by itself
5x/5=-45/5
cross out 5 and 5 then becomes 1*1*x=x
-45/5=-9
x=-9
answer:
(-9,10)
Answer:
idk
Step-by-step explanation:
i have no clue
Are you looking for where they cross ? if so its (-1,2)
Answer:
y=3
Step-by-step explanation:
you times 2 and 2 together and it give you 4
