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.
= 4 1/2 (2 3/4 + 1 3/4)
Hope you give the brainliest answer.
I think you need to explain more for one to answer it.
Please give more details and I'll try to help (if this is meant to be a question)
Answer:
C.8x - 16
Step-by-step explanation:
multiple 4 with 2x = 8x,
then multiple 4 with -4 = -16
add 8x and -16 the answer is 8x - 16
Answer:
I think the answer is B, tell me if it is wrong.
