Answer:
229.7125
Step-by-step explanation:
Answer: #20, x = 3
#21, x = 1/2
Step-by-step explanation:
#20) x + 4 + x + 2+ x + 5 = x + 3 +x+3+x+1+x+1
3x + 11 = 4x + 8
<u>-3x -3x</u>
11= x + 8
<u> - 8 - 8</u>
3 = x
#21) 12x(5) = 6x + 9 + x + 10 + x + 7
60x =8x + 26
<u> -8x -8x</u>
52x = 26
divide both sides by 52
x = 1/2
Answer:

Step-by-step explanation:
The question is poorly formatted. The original question is:

We have:

Open bracket


Express 8 as 2^3



Express 2^3 as 8

Expand each exponent

Split



Factorize

Step-by-step explanation:
Let the required number be x.

Answer:
2cos^2u--1
1--2sin^2u
cos^2u--sin^2u
Step-by-step explanation:
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