Answer: x = 9
Mel's mistake was in the last step, she multiplied by 2 instead of dividing by 2
Step-by-step explanation:
2x + 1 = 19
Subtract 1 from each side
2x = 18
Divide by 2
x = 9
Answer:
iits F(x)+440-201
Step-by-step explanation:
Answer:
Mean = 3.125 ≈ 3.13
Step-by-step explanation:
Mean = <u>Sum of numbers</u> = <u>1 + 2 + 3 + 4 + 2 + 6 + 3 + 4</u> = <u>25</u> = 3.125≈3.13
Amount of number 8 8
Answer:
The probability a salamander has a length between 12.2cm and 16.5cm is 0.6930
Step-by-step explanation:
We start by finding the z-score of each
Mathematically;
z-score = (x - mean)/SD
for 12.2 cm
z-score = (12.2 - 15)/2 = -2.8/2 = -1.4
For 16.5 cm
z-score = (16.5 -15)/2 = 1.5/2 = 0.75
So the probability we want to calculate is;
P( -1.4 < z < 0.75)
we can calculate this using the normal distribution table
Mathematically;
P( -1.4 < z < 0.75) = P( z < 0.75) - P( z < -1.4)
= 0.2263 + 0.30738
= 0.69262
Answer:
v=24
Step-by-step explanation:
V= 3
V= 3
V= 3
V= 3×8
V= 24