3x²–243=0 —> 3 (x²–81) = 0 —>
x²–81=0 —> (x-9)(x+9)=0
x-9=0 —> x=9
x+9=0 —> x=–9
I hope I helped you^_^
Meagan, Joey, Danny, Zane, Dominic, Cassandra
Answer:
6 hours
Step-by-step explanation:
A: y=125+7x
B: y=110+10x
for A to be a better deal than B, 125+7x<110+10x has to be true
- subtract 7x from both sides and subtract 110 from both sides of the inequality: 15<3x
- divide by 3: 5<x
- so x has to be greater than 5, im pretty sure it's 6 hours but it might also be 5 depending on how it's taught for you
Answer:
0.1728
Step-by-step explanation:
6^-2= 1/6^2
3^-3= 1/3^3
1/36 * 1/27 * 3.6 * 3.6 * 3.6
= 0.1728