Linear mathematical models describe real world applications with the use lines. For instance, a car going 50 mph, has traveled a distance represented by y=50x, where x is time in hours and y is miles. The equation and graph can be used to make predictions.
Whats the question? The cheapest is B and 10 percenct off is 900 on that 1,000 and A is 50 $ more expensive then B
Answer:
The mean of the total repair time is 150 minutes.
The variance of the total repair time is 725 minutes^2.
Step-by-step explanation:
To solve this problem, we have to use the properties of the mean and the variance. Our random variable is the sum of 3 normal variables.
In the case, for the mean, we have that the mean of the sum of 3 normal variables is equal to the sum of the mean of the 3 variables:

For the variance, we apply the property for the sum of independent variables (the correlation between the variables is 0):

Answer:
what-
Step-by-step explanation:
Answer:
$189.00
Step-by-step explanation:
Using the total cost of the shoes before tax, but after the sale price and coupon were applied, $74.50, first add back the $20 discount from the coupon:
74.50 + 20.00 = 94.50
Then, add the new amount by itself to find the original price since the sale applied a 50% discount:
94.50 + 94.50 = $189.00