Answer: Total cost of their meal is $78
Step-by-step explanation: 20% of 65 is a 13 dollars tip adding up to a total of $78
65*0.2 = 13
65+13=78
substitution
y = 7x-26 (1)
y = 4x-11 (2)
1⇒2
7x-26=4x-11
3x=15
x=5
y = 7(5)-26
y = 9
point (5,9)
Answer:
If Becca walks 2 dogs each month then in the 3rd month she walk 2 additional dogs.
Step-by-step explanation:
The answer i got is 2 because she walks 2 dogs each month so that means in month 3 she walked 2 dogs cause she walk 2 a month.
Answer:
609
Step-by-step explanation:
Standard deviation = = $30
Margin of error = E = $2
Confidence level = 90%
Since the distribution is said to be normal, we will use z scores to solve this problem.
The z score for 90% confidence level = z = 1.645
Sample size= n = ?
The formula to calculate the margin of error is:
Using the values in above equation, we get:
This means, the minimum number of observations required is 609
<span>I think it is 28
hope it helped
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