First setup the system of equations for the given case.
Let sandwich=x
and delivery fee =y
Equations are:
4x+y=33 Equation 1
8x+y=61 Equation 2
Subtract equation 1 from 2.
4x=28
x=7
Now substitute value of x in equation 1.
4(7)+y=33
28+y=33
y=5
So cost of single sandwich=$7 and Delivery fee=$5
Now cost of 12 sandwiches:
12x+y=85
Put y=5
12x+5=85
12x=80
x=6.67 which is less than 7. So, They are not able to get 12 sandwiches for $85.
Answer:
1. y=3
2.x=4
3. k= -2
4.n= -45
5. c = -3
6. p = 4
7. t = 0
8. r = 
Step-by-step explanation:
Answer:
180 inches divide by 2.25 inches is 80
8/ 712 is 72
First see if 8 can go into 71
8 goes into 71 8 times then subtract 71 and 64 since 8*8 is 64
Finally you will get the solution 72 so find how many time 8 can go into 72 and that will be 9.
Answer:89