Answer:
20
Step-by-step explanation:
Using the rule of radicals
×
⇔ 
Given
× 
= 
= 
= 20
Answer:
x=-5 :)
Step-by-step explanation:
3x+15=0
-15 -15
3x=-15
/3 /3
x=-5
Answer:
x ≤ 7.5
Step-by-step explanation:
First, get x alone by multiplying both sides by 3 (to get rid of the fraction)
3 (1/3x) ≥ 3(2.5)
x ≤ 7.5
(The sign will flip whenever you multiply or divide in an inequality)
Since the sign is 'less than or <u>equal to</u>' you need a closed dot on 7.5, and it will be a ray pointing left, because x will be a number smaller (aka less than) than 7.5