I think the answer might be $9
X= sandwiches
y= bottles of water
QUANTITY EQUATION
x+y= 200
COST EQUATION
$3x + $0.75y= $318.75
STEP 1
solve for one variable in quantity equation and substitute in cost equation
x+y= 200
subtract y from both sides
x= 200-y
STEP 2
substitute 200-y in for x
$3x + $0.75y= $318.75
3(200-y) + 0.75y= 318.75
600 - 3y + 0.75y= 318.75
combine like terms
600 - 2.25y= 318.75
-2.25y= -281.25
divide both sides by -2.25
y= 125 number of water bottles
STEP 3
substitute y=125 in either equation
x+y= 200
x + 125= 200
x= 75 sandwiches
ANSWER: There were 75 sandwiches and 125 bottles of water.
Hope this helps! :)
Answer:
y=-2x+9
Step-by-step explanation:
Answer:
B. 3.45 > (-4.35)
Step-by-step explanation:
3.45 is positive, and (-4.35) is negative.
Answer:
x= y-10a/10
Step-by-step explanation:
Multiply 10 by x+a using the distributive property. 10x+10a=y
Subtract 10a from both sides. 10x=y-10a
Divide both sides by 10. 10x/10 = y-10a/10.
Dividing by 10 undoes the multiplication by 10. x=y-10a/10
Divide y-10a by 10.
I hope this helps and I'm sorry if I got this wrong. I tried my best. Thanks for the question :)