The denominator has to be the total number of kids and the numerator is the kids that can stay after school. so 12/30 then simplify. 12/30 divided by 6/6 = 2/5
Answer:
A) 9
Step-by-step explanation:
R=7x+17
S=4x-6
Q=180-110=70
- 4x-6+7x+17+70=180
- 11x+81=190
- 11x=180-81
- 11x=99
- x=99/11
- x=9
Answer:
0.0003
Step-by-step explanation:
for the indicated probability
we need to find : Probability (P) ( X > or = 30) = 1 - P( X < 30 )
z-score(30) = (30 - 14.6)/3.8 = 4.053
looking in z-tables for the corresponding probability
P(x<30) = 0.99997
indicated probability
P ( X > or = 30) = 1 - 0.99997 = 0.0003 (answer)
Use desmos.com
or just plug in values for x