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crimeas [40]
3 years ago
6

Twin brothers, Andy and Brian mow their grandparent's lawn together in 12 minutes. Brian could mow the lawn himself in 10 minute

s more than it would take Andy. How long would it take each person to mow the lawn alone?
Mathematics
1 answer:
saveliy_v [14]3 years ago
4 0
Let
x = time of Byran's work
x + 10 = time of Andy's work

Rate is usually expressed a reciprocal. The total rate will be 12 minutes.
1/x + 1/(x + 10) = 1/12
The value of x will be 20 minutes.

Therefore Byran can take 20 minutes while Andy can take 30 minutes.
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Whats 9+10 ?<br>A)12<br>B)21<br>C)19<br>D)9​
Ostrovityanka [42]

Answer: 21

Step-by-step explanation: (If you're serious it's 19)

4 0
3 years ago
Read 2 more answers
If you have 80 employees and you grew 116%, what was the amount of original employees?
Nezavi [6.7K]

Answer: 69

Step-by-step explanation:

Let the original employee be x , this means that

116% of x = 80

\frac{116x}{100} = 80

116x = 8000

divide through by 116

x = 8000/116

x = 68.96551724

Since we are dealing with employees , therefore x ≈ 69

This means that there were 69 employees originally

7 0
2 years ago
Machines at a factory produce circular washers with a specified diameter. The quality control manager at the factory periodicall
Dmitrij [34]

Answer:

C) The test provides the convincing evidence that the proportion is greater than 90%, but the actual proportion is equal to 90%.

Step-by-step explanation:

Options are missing from the question. The complete question with its options is shown in the image below.

We need to describe about the Type 1 error. In Statistics there are two main errors: Type 1 error and Type 2 error.

  • Type 1 Error occurs when we reject the null hypothesis when infact its true.
  • Type 2 Error occurs when we fail to reject the null hypothesis when infact its false.

In the given case the Null Hypothesis is:

The proportion of all washers produced with the specified diameter is equal to 90 percent.

The Type 1 error will occur when the test results will reject the Null hypothesis and accept that the specified diameter is greater than 90% , when infact the Null hypothesis is true and actual proportion is equal to 90%.

Therefore, the correct option will be:

C) The test provides the convincing evidence that the proportion is greater than 90%, but the actual proportion is equal to 90%.

5 0
3 years ago
Taliyah was scuba diving at 29 feet below sea level (–29). Then she swam up to 13 feet below sea level (–13). Solve the number s
kap26 [50]

Answer:

-16

Step-by-step explanation:

So you want to change the - into a + and the negative sign before the 13 also into a plus. So it is -29 + 13 and that would be -16 ^.^ Hope this helped!!

3 0
2 years ago
Rewrite k is less than 12 using &gt;,
Lena [83]
K is less than 12, so if you put k first, it would be written as k < 12.
However, you are needing to use >.
Therefore the answer is
12 > k (This says that 12 is greater than k, but it can also be said as k is less than 12, if read backwards)
5 0
3 years ago
Read 2 more answers
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