2j+5=21
2j=16
j=8
<span>Jack is 8 years old.
</span>
Hope This Helped! :3
Answer:
500 boxes an hour?
Step-by-step explanation:
Answer
38°
Step-by-step explanation:
52+90+x=180
180-52-90=x
x=38
Answer:
6
Step-by-step explanation:
$603 dollars ÷ 100 shoppers = $6.03 per shopper, or 6
as a mixed number
Answer:
37
Step-by-step explanation:
Margin of error = critical value × standard error
For 98% confidence, CV = 2.326 (from t table).
Standard error is σ / √n, where σ is the population standard deviation, and n is the sample size.
Plugging in:
5 = 2.326 × 13 / √n
n = 36.6
Rounding up, n = 37.