Answer:
7x+y=0
x+6y=5
x+y=0
Step-by-step explanation:
Answer: 2017
Step-by-step explanation:
Given : The proportion of people that smoke : p=0.3
Margin of error : E= 0.02
Significance level :
Critical value : 
The formula to calculate sample size ( if proportion is known) :-

Hence, the required minimum sample would be 2017.
Answer:
–24°C
Step-by-step explanation:
(–3°C) × 8 = <u>–24°C </u>
Answer:
I think it's A
Step-by-step explanation:
225x + 400 ≥ 2200
225x ≥ 1800
x ≥ 8
Dilation because the sides will not be the same size as the original