Answer:
on my knowledge i can tell you the methods used to solve it which are;
Step-by-step explanation:
<h3>Elimination method.</h3><h3>Substitution method.</h3><h3>Graphical method.</h3>
Answer:
900 sample size
Step-by-step explanation:
To determine the sample size for a proportion, the margin of error formula is used to determine this:


Where p is the proportion, E is the margin of error, n is the sample size, q = 1 - p,
is the z score.
Since the proportion is not known, the sample size needed to guarantee the confidence interval and error is at p = 0.5 and q = 1 - p = 1 - 0.5 = 0.5
E = 5% = 0.05,
= 3. Hence:

Answer:
10
Step-by-step explanation:
2x5 is basically 1x5= 5x2=10
Answer:
D ez
Step-by-step explanation:
Answer:
7.75
Step-by-step explanation:
56-27-21-0.25=7.75