Answer:
a=7.85-1/2^b
Step-by-step explanation:
2a=15.7-b Move variable to the right side and change its sign
2a=15.7-b Divide both sides of the equation by 2
a=7.85-1/2^b The final solution for a is
7 + 7 + 5 + 5 (two sides are 7 and two sides are 5) = 24
2(m-27n) this is the answer
Down three and over left four so something like (-3, -4) im pretty sure
Multiply the binomials:
(3x + 4)(5x - 2)

Final answer
Option B is the final answer