Answer:
or 
Step-by-step explanation:
we have

step 1
Group terms that contain the same variable

step 2
Combine like terms

step 3
Eliminate parenthesis

step 4
Factor the number 

B=8. A^2+B^2=C^2. This means 6to the second power plus B to the second power equals10 to the second power. 36+b^2=100. B to the second power equals 64. Square root of 64 is 8, so B equals 8
Answer:
57 degrees
Step-by-step explanation:
Same side interior angles are supplementary which means they both equal 180 degrees.
Answer:
2590
Step-by-step explanation:
30+2000+400+60+100