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KonstantinChe [14]
3 years ago
15

Kelly has 114 hours to complete 3 chores before leaving for soccer practice. If she spends an equal amount of time on each chore

, which of the following could Kay use to find the part of an hour each chore will require?
Mathematics
2 answers:
Ksenya-84 [330]3 years ago
8 0
She could do 1 chore in 38 hours. you could make an equation by doing 3/x=114
Leto [7]3 years ago
3 0

Answer:

5/4 times 1/3

Step-by-step explanation:

I got my answer because it said she has 1 1/4 hours to do her 3 chores and there is a mixed number in the problem so convert that mixed number to an improper and you get 5/4. Now the 3 is a whole number so we have to change that to an improper as well and that would be 3/1. Next we have to find the reciprocal of 3/1 and that would be 1/3 then you add a multiplication sign to the problem and it should look like this.

5/4 x 1/3

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4 0
3 years ago
An owner of a key rings manufacturing company found that the profit earned (in thousands of dollars) per day by selling n number
vovikov84 [41]

Answer:

The number of key rings sold on a particular day when the total profit is $5,000 is 4,000 rings.

Step-by-step explanation:

The question is incomplete.

<em>An owner of a key rings manufacturing company found that the profit earned (in thousands of dollars) per day by selling n number of key rings is given by </em>

<em />P=n^2-2n-3<em />

<em>where n is the number of key rings in thousands.</em>

<em>Find the number of key rings sold on a particular day when the total profit is $5,000.</em>

<em />

We have the profit defined by a quadratic function.

We have to calculate n, for which the profit is $5,000.

P=n^2-2n-3=5\\\\n^2-2n-8=0

We have to calculate the roots of the polynomial we use the quadratic equation:

n=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\n= \frac{-2\pm\sqrt{4-4*1*(-8)}}{2}= \frac{-2\pm\sqrt{4-32}}{2} = \frac{-2\pm\sqrt{36}}{2} =\frac{-2\pm6}{2} \\\\n_1=(-2-6)/2=-8/2=-4\\\\n_2=(-2+6)/2=4/2=2

n1 is not valid, as the amount of rings sold can not be negative.

Then, the solution is n=4 or 4,000 rings sold.

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The graph of a polynomial is shown below. Between which two x-values does this polynomial have an extreme value?
stiv31 [10]

Answer:

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Step-by-step explanation:

From the picture attached, it can be seen that an extreme value, that is, a maximum of the polynomial is found between x = -3 and x = -2. In this extreme point, the polynomial has an approximate value of 4.5

7 0
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