Answer:

Step-by-step explanation:
Given:
equation:1
equation:2
Terminating the equations by subtracting equation:2 from equation:1

Putting 'x' in equation :1


Total number of questions/ Number correct gives you 31/40 = .775 but expressed as a percent it will move two decimal places and become 77.5%
1 would be B. 2 would be a
Answer:
given
hope it helps!
Step-by-step explanation:
(10x^3y^2/5x^-3y^44)
= (10/5)(x^3/x^-3)(y^2/y^44)
= (2)(x^6)(y^-42)
= 2x^6y^-42
(2x^6y^-42)^3
= 8x^6*3y^-42*3
= 8x^18y^-126