You first multiply the outside exponents into the numbers in the parentheses.
When you have an exponent being multiplied directly to another exponent, you multiply the exponents together.
For example(because I am a bad explainer):


When you divide an exponent by an exponent, you subtract the exponents
For example:

When you have a negative exponent, you move it to the other side of the fraction to make the exponent positive
For example:



You can think of it like this if you want:
Now multiply the outside exponents into the exponents in the parentheses
Divide 27 and 9

Your answer is 
7/8 in decimal form is 0.875 because you are dividing 7 by 8
Answer:
Step-by-step explanation:
Answer:
(0.5, 4 )
Step-by-step explanation:
Given the 2 equations
2x + 3y = 13 → (1)
4x - y = - 2 → (2)
Multiplying (2) by 3 and adding to (1) will eliminate the term in y
12x - 3y = - 6 → (3)
Add (1) and (3) term by term to eliminate y
14x = 7 ( divide both sides by 14 )
x = 0.5
Substitute x = 0.5 into either of the 2 equations and evaluate for y
Substituting into (1)
2(0.5) + 3y = 13
1 + 3y = 13 ( subtract 1 from both sides )
3y = 12 ( divide both sides by 3 )
y = 4
Solution is (0.5, 4 )