Answer:
D
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
------------------(1)
-----------------------(2)
Subtracting eq (2) from eq (1)
Answer:
A single cheeseburger order cost $1.23
A single fries order cost $1.28
Step-by-step explanation:
Let the cost of cheeseburgers be c and the cost of fries be f
Mathematically;
4c + 3f = 10.75 ••••(i)
Secondly;
5c + 2f = 11.2 ••••(ii)
We have two equations to solve simultaneously;
Multiply i by 2 and ii by 3
8c + 6f = 21.5
15c + 6f = 33.6
Subtract ii from i
-7c = -12.1
c = 1.73
Recall;
5c + 2f = 11.2
5(1.73) + 2f = 11.2
2f = 11.2-8.65
2f = 2.55
f = 2.55/2
f = 1.28
Four ten dollar bills and three twenty dollar bills
Answer:
Robert would have needed 259 point to increase his average to 211.
Step-by-step explanation:
Averages are described by the following equations:
Initial average:
Real average:
Expected average:
Robert would have needed 259 point to increase his average to 211.