1. Collect like terms
20t^2 + (-70 + 300)
2. Simplify
20t^2 + 230
See picture reply for answer.
Answer:
The purpose of scientific notation is to make the numbers and quantities used easier to comprehend, to read and to write.
Step-by-step explanation:
The purpose of scientific notation is to make the numbers and quantities used easier to comprehend, to read and to write.
Answer:
9 should be added to both sides of the equation to complete the square.
Step-by-step explanation:
Given : 
To Find: What number should be added to both sides of the equation to complete the square?
Solution:

Add the square of half of coefficient of x
So, the square of half of coefficient of x = 
So, 




Thus 9 should be added to both sides of the equation to complete the square.
120+.5x=50+.7x
Subtract 50 from both sides and then subtract .5x from both sides to get 70=.2x. Then divide both sides by .2 to get x=350.