Answer:
10 days and 16 hours.
Step-by-step explanation:
15 men work in 16 days to complete the work. So 1 man contributes 16/15 days.
For 20 men there is an addition of 5 men. [20–15)* 16/15] days = 16/3 days. Substract 16/3 days from 16 days = 16 - (16/3) = 10 days and 16 hours.
3•4=12
16-12=4
She has 4feet left
Answer:
240 = w (2w − 4) (w − 1)
Step-by-step explanation:
Volume of a rectangular prism is width times length times height.
V = wlh
Given:
V = 240
l = 2w − 4
h = w − 1
Substituting:
240 = w (2w − 4) (w − 1)
Answer:
(A) Statistical samples are more representative of the population.
Step-by-step explanation:
The following is generally not true about statistical sampling as compared to non statistical sampling:
(A) Statistical samples are more representative of the population.
Statistical sampling refers to a type of statistical study whose sampling method is based on the way we select samples from the population to take part the study/survey.
Substitute the 1st equation in the 2nd, we get:
3x + 2(-3 + 2x) = 2
3x -6 +4x = 2
7x = 8
x = 8/7
Replace x = 8/7 in equation 1,
y = -3 + 2(8/7) = -3 +16/7 = -5/7
