9514 1404 393
Answer:
5
Step-by-step explanation:
The left side simplifies to ...
2x +16
The right side simplifies to ...
2x +21 -__
The x-terms are already equal. To make the constant terms equal, we want ...
16 = 21 -__
The blank must be filled with the value 21-16 = 5 to make the statement true.
5 goes in the blank.
X= be coffee
Y=be donuts
Set up equations
10x+5y=16.50
5x+10y=14.25
Now multiply first equation by -2 to get a negative
(-2)10x+5y(-2)=16.50(-2)
-20x-10y=-33
Now put both equations to solve for x
-20x-10y=-33
5x+10y=14.25
___________
-15x. = -18.75
Now divide -15 bith sides to get x alone
X= -18.75/-15
X= 1.25
The cost of each coffee cup$1.25
First divide by 4 to get x^2=9. Then take the square root of both sides. x=3 and x = -3.
Answer:
20 each girl
Step-by-step explanation:
40 divided by 2 girls is 20
