Answer:
25x +23
Step-by-step explanation:
2.5(10x + 8) +3
2.5(10x + 8)
25x + 20
25x + 20 + 3
25x + 23
hope dis helps ^-^
Answer:
1 hour=40 miles
? hours=350miles
<u>1x350</u>
40
=8 hours 3mins
Step-by-step explanation:
3r/10? To find that we need an answer to set it equal to
Answer:
Step-by-step explanation:
n = 400
Proportion p = 229/400= 0.5725
For 95% confidence interval we use Z value as 1.96
Std error = 0.025
margin of error = 1.96*0.025
Confidence interval 95% = 0.5725±Margin of error
= (0.524, 0.621)
b) When smiled x becomes 277
p = 0.6925
Std error = 0.023
Margin of error= 1.96*0.023
Confidence interval = (0.647, 0.738)
Smiling increases the chances of stopping since mean and conidence interval bounds are showing increasing trend.