Well first do you parentheses and the multiply all of your exponets
Answer:

Step-by-step explanation:
The formula for the surface area of a pyramid is 
How ever many numbers are being multiplied by itself it goes with the to the power of ... if it is being added to itself it is ... times...
Step-by-step explanation:
13+5+5+4.3
Answer:
x = ± 
Step-by-step explanation:
9x² - 4 = 0 ( add 4 to both sides )
9x² = 4 ( divide both sides by 9 )
x² =
( take the square root of both sides )
x = ±
= ±
= ± 