(2x7)-3
=11
.................
Answer: No, the normal curve cannot be used.
Step-by-step explanation:
The theorem of the Normal approximation states that if X is B(n,p) then for large n X is N(np, np(1-p)).
The accuracy of this approximation is good
i. for n > [10/p(1-p)]
ii. p is close to 1/2
Hence given p= 4% = 0.04,
q = 1 - 0.04 = 0.96
Let N = [10/p(1-p)]
We find N = 10/p(1-p) = 10/(0.04× 0.96)
N ~= 260
Since n < 260 and p < 0.5
The approximation is not a good one
Answer:
-600
Step-by-step explanation:
Jackson's initial score was 300, then his later score became -300, so you know that he had to lose points.
-300=300+x
** x represents the point change
Then just solve the equation by getting x by itself. You do this by subtracting 300 from both sides:
-300=300+x
-300 -300 = -300-300+x
-600 = x
Equation for company a: y=20x+8
Equation for company b: y=24x+4
Company A would be cheaper for 5 loads of laundry, because it is $108 dollars opposed to $124 which is what company b would charge for 5 loads.
$32 dollars is saved by using the services of company A instead of company B to clean 9 loads of laundry.
The answer is B. I hope this helps
