Homer and bart plan to buy one computer for 499.00 strictly for gaming purposes. Games cost 49.99 each. define each variable and
2 answers:
Answer:
The algebraic expression is where <em>x</em> is the number of games they bought and <em>y</em> be the total cost.
Step-by-step explanation:
Consider the provided information.
The cost price of computer is 499.00
Let <em>x</em> is the number of games they bought and <em>y</em> be the total cost (before sales tax).
The cost of each game is 49.99. If they bought <em>x</em> games, then the total cost will be:
Therefore, the algebraic expression is where <em>x</em> is the number of games they bought and <em>y</em> be the total cost.
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Answer:
Step-by-step explanation:
Step 1:
x - > number of Avocado
y -> number of melon
Step 2:
x ≤ 3y
x + y ≥ 20
Step 3:
x + y≥ 20
y ≥ -x + 20
Step 4:
( 1 , 20)
x ≤ 3y ; y≥ -x + 20
1 ≤ 3*20 ; 20 ≥ -1 + 20
1 ≤ 60 ; 20 ≥ 19
Answer:
So the answer for this case would be n=1337 rounded up to the nearest integer
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the sample mean for the sample
population mean (variable of interest)
represent the population standard deviation
n represent the sample size
Solution to the problem
The margin of error is given by this formula:
(a)
And on this case we have that ME =0.07 and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formula to find it:"=-NORM.INV(0.01;0;1)", and we got , replacing into formula (b) we got:
So the answer for this case would be n=1337 rounded up to the nearest integer