3 years ago

SOLVE ASAP! PLS HELP ME!!!

Mathematics

1 answer:

trapecia [35]3 years ago

7 0

9514 1404 393

Answer:

A. 2.1

Step-by-step explanation:

Put the numbers in the equation and do the arithmetic.

1/R = 1/(3 1/2) +1/(5 1/4)

1/R = 1/(7/2) +1/(21/4) = 2/7 +4/21 = (6 +4)/21

R = 1/(10/21) = 21/10

R = 2.1

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