Answer:
x = ±10
Step-by-step explanation:
4x² - 400 = 0
Add 400 to both sides
4x² = 400
Divide both sides by 4
x² = 100
Take the square root of both sides
x = ±10
It is 2 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
do you know how to count
Step-by-step explanation:
you had putten 5 cities not 3
Answer:
The expression is 2k + 4.
Step-by-step explanation:
You have to collect like-terms :
(8k + 9) - (6k + 5)
= 8k + 9 - 6k - 5
= 2k + 4
If I'm not wrong I believe it would be 343 different ways.
