The solution is x=6 and y=5
Answer:
Maura runs faster
Step-by-step explanation:
Set them up as fractions:
miles / hours, then divide to
compare the results:
Maura: 5 / 1.25 = 4 MPH
Ava: 3 / .83 = 3.6 MPH
Answer:
A sample of 752 should be taken.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of .
The margin of error is of:
90% confidence level
So , z is the value of Z that has a p-value of , so .
No preliminary sample is taken
This means that
How large should the sample be to be 90% sure that the estimate is within .03 of the population proportion?
This is n for which M = 0.03. So
Rounding up:
A sample of 752 should be taken.
Answer:
(3x-17)°+(x+40)°+(2x-5)°=180°[sum of angle of triangle]
6x°+18°=180°
6x°=180°-18°
x°=162°÷6°
x°=27°
Again,
=3x-17. 2x-5. x+40°
=3×27-17. =2×27-5. =27+40
=64°. =49°. =67°