False a rectangle could never be a square
Answer:
$7
Step-by-step explanation:
38-3=35
35/5=7
Answer:
16
Step-by-step explanation:
(1) Get the mean: (2 + 13 + 4 + 10 + 6) / 5 = 7
(2) Variance Formula: Σ(x-mean)^2)/N
-> <u>(2-7)^2 + (13-7)^2 + (4-7)^2 + (10-7) ^2 + (6-7)^2</u>
5
= 16
The time taken for the smaller pipe to fill the pool by itself is 15.71 hours
<h3>Rate of work</h3>
- Time taken for both pipes = 6 hours
- Time taken for long pipe = x
- Time taken for small pipe = x + 6
- Rate of work of both pipes = 1/6
- Rate of work of long pipe = 1/x
- Rate of work of small pipe = 1/x + 6
1/6 = 1/x + 1/(x+6)
1/6 = (x+6)+(x) / (x)(x+6)
1/6 = (x+6+x) / x²+6x
1/6 = (2x+6)(x² + 6x)
1(x² + 6x) = 6(2x+6)
x² + 6x = 12x + 36
x² + 6x - 12x - 36 = 0
x² - 6x - 36 = 0
x = 9.71 or -3.71
The value of x cannot be negative
Therefore, the
Time taken for long pipe = x
= 9.71 hours
Time taken for small pipe = x + 6
= 9.71 + 6
= 15.71 hours
Learn more about rate of work:
brainly.com/question/24900258
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