Answer:

Step-by-step explanation:
You can multiply on the upper and bottom part by the same number without changing the fraction so 
Answer:
I think it might be B.
Step-by-step explanation:
If not sorry plz mark brainliest if right
Answer:
5 pens = 15$ and 4 pencils = 4$
Step-by-step explanation:
7-3=4, so 4 pens is 12$
12/4 = 3, so 1 pen = 3$
Remove the pens from the equation
7x3=21
24-21=3
3/3=1, so each pencil costs 1$
Answer: it is b
Step-by-step explanation:
i took the test boys
The average of -20 and 6 is (-20+6)/2, or (-14)/2, or -7.