Answer:
since the unknown amount can buy 100 pencils
he bought 70 pencils
therefore $4.50 can buy 30 pencils
so 1 pencils cost $4.50 /30=0.15
Steps:
1-29f^2/d^4/2f^2= 58f^2/d^4
All i did in step one was simplify D variables then multiplied 29f^2 and 2f^2 together to get 58f^2
d5/58f^4
Answer is A
or
Step-by-step explanation: