A little Algebra, and we're home free!
We are given R = 20 and r2 = 75. We need to find r1.
The formula is 1/R = 1/r1 + 1/r2. Plug-in:
1/20 = 1/r1 + 1/75
1/20 - 1/75 = 1/r1
0.0366 = 1/r1
r1 = 1/0.03666
r1 = 27.272
Our answer is r1 = 27 ohms.
The would be 40 because 8 times 5 equals 40 then times it by 1 and you got your answer
Answer:
x=9.5
Step-by-step explanation:
how i interperted the statement was 2x-9=10 and then you just solve for x by adding 9 to both sides and getting 2x=19 and then you divide both sides by 2 and you get 9.5
They are not because 1/2 you cannot multiply it by anything to get 1/8
The reciprocal of 7/10 is just the number flipped around. It is 10/7.