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Kay [80]
3 years ago
9

HELP ME PLSSSSS I DONT UNDERSTAND THIS QUESTION

Mathematics
1 answer:
Vanyuwa [196]3 years ago
8 0
Ok, so it seems you might have hard time dividing fractions

remember
(a/b)/(c/d)=(a/b)(d/c)=(ad)/(bc)



1. miles per hour
2/3 miles per 10 minutes
60 minute per mile
10/60=1/6
2/3 miles per 1/6 hour
(2/3)/(1/6)=(2/3)(6/1)=12/3=4
A is answer



2.
cost per pound is cost/poounds
cost=9
pounds=1 and 1/4=5/4
9/(5/4)=(9/1)/(5/4)=(9/1)(4/5)=36/5=7.20

D is asnwer
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FIND THE SUM OF 20 TERMS OF THE ARITHMETIC SERIES IN WHICH 3rd TERM IS 7 AND 7th TERM IS 2 MORE THAN THREE TIMES ITS 3rd TERM
algol13

Answer:

740

Step-by-step explanation:

The n th term of an arithmetic series is

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where a₁ is the first term and d the common difference

Given a₃ = 7 and a₇ = (3 × 7) + 2 = 21 + 2 = 23 , then

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Substitute d = 4 into (1)

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Answer:

The element you add is      b^2 / 4a

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The element you add is      b^2 / 4a

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b^2 / 4a

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