Answer:
The jelly beans cost $2.25 / pound
The trail mix costs $1.25 / pound
Step-by-step explanation:
Let +a+ = cost/pound of jelly beans
Let +b+ = cost/pound of trail mix
(1) 6a + 2b =16
(2) 3a + 5b =13
Multiply both sides by 2
and subtract (1) from (2)
(2) 6a -2b = -16
(1) -6a -2b = -16
8b=10
b=1.25
and
(1) 6a+2b=16
(1) +3a+b=8
(1) 3a+1.25=8
(1) +3a=6.75
(1) a=2.25
Answer: 
Step-by-step explanation:

3 notebooks will cost $3.15
Answer:
I believe the answers is C
Step-by-step explanation:
When you multiply numbers with powers that have the same base (in this case 5), it is like you are adding the powers together. So, 18+3= 21 so the answer is 5^21
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