Take a pic of it or look it up on safari or download slander it has ALOT of math book answers like this one
Answer: 27
Step-by-step explanation:
2/3x-7=11
2/3x=18
1/3x=9
x=27
Answer:
-2.8
Step-by-step explanation:
Given that:
Mean, μ = 78
Standard deviation, σ = 5
Omar's score, x = 64
The Zscore of Omar's score :
Zscore = (x - μ) ÷ σ
Zscore = (64 - 78) / 5
Zscore = - 14 / 5
Zscore = - 2.8
Hence, Omar's exam score is - 2.8