Answer: 18/5 hours, or 3.6 hours
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Work Shown:
x = amount of time it takes Blake to do the job by himself
y = amount of time it takes Ned to do the job by himself
z = time it takes if they worked together
In this case,
x = 9 and y = 6
Use those values to find z.
Answer: B, D, and E
<u>Step-by-step explanation:</u>
f(x) = x² - 1
(0, 1): 1 = (0)² - 1 ⇒ 1 = -1 FALSE
(1, 0): 0 = (1)² - 1 ⇒ 0 = 0 TRUE
(3, 5): 5 = (3)² - 1 ⇒ 5 = 8 FALSE
(5, 24): 24 = (5)² - 1 ⇒ 24 = 24 TRUE
(-2, 3): 3 = (-2)² - 1 ⇒ 3 = 3 TRUE
(-4, -17): -17 = (-4)² - 1 ⇒ -17 = 15 FALSE
Step-by-step explanation:
a)
total no. of pupils is not more than 24
therefore first equation is
(x+y) ≤ 24. ....(1)
No. of girls exceeding the no. of boys by atleast 4
(y-x) ≥ 4. .....(2)
b) Now Liza chooses 8 boys
Maximum no. of girls = ?
Using first inequality
y+8= 24 ( maximum value of less than or equal to function is equal to itself)
Therefore,
y= 24-8
=16
Minimum no. of girls = ?
Using second inequality
y-8 =4 (minimum value of greater than or equal to function is equal to itself)
Therefore,
y= 4+8
y=12
Answer:
a) 2linear inequalities
(x+y) ≤ 24
(y-x) ≥ 4
b) Max no. of girls = 16
Min no. of girls = 12
Hope it helps...
2. 1 1/2 each
3. 1 1/4 each
4. 1 3/4 each
5. 3/4 each
Answer:
Option D is correct. All US households are among the population of interest.
Step-by-step explanation:
The Census bureau is a national body in the U.S. and they do the survey of 250000 different households monthly. The surveys go out to all corners of the U.S. depending on which part of the nation is doing the survey next.
It shows that the entire U.S. population is of interest to the census bureau.