Answer:
n = 61 costumers
Step-by-step explanation:
For calculating the number of costumers he should sample we use the next equation:
Where E is the error that we are prepared to accept, in this case E = 0.15
How we don't know the value of p, we can estimate it like p = 0.5
∝ = 1-0.98 = 0.02
1-∝/2 = 0.99
n = 60.32 costumers
n ≈ 61 costumers
Answer:
<em>- 2 </em>
<em> + 7x²y - 24y² </em>
Step-by-step explanation:
( 5 - 5x²y + 9y² ) - ( 7 - 12x²y + 33y² ) =
5 - 5x²y + 9y² - 7 + 12x²y - 33y² =
( 5 - 7 ) + ( - 5x²y + 12x²y ) + ( 9y² - 33y² ) =
<em>- 2 </em><em> + 7x²y - 24y²</em>
Answer:
10 games
Step-by-step explanation:
Let C be cost and x be number of games
Arcade A: C = 5 + 0.6x
Arcade B: C = 7 + 0.4x
for both arcades to be the same price, Both C's must be equal, hence we equate the right side of both equations:
5 + 0.6x = 7 + 0.4x (subtract 5 fromboth sides)
0.6x = 7 + 0.4x - 5
0.6x = 2 + 0.4x (subtract 0.4x from both sides)
0.6x - 0.4x = 2
0.2x = 2 (divide both sides by 0.2)
x = 2 / (0.2)
x = 10
Yes I agree with the person that put that answer
From the exterior angle theorem, we have 
so 
