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egoroff_w [7]
3 years ago
13

A particular project can be completed by six people working eight hours a day for twenty days. To speed up completion of the pro

ject, eight workers were put on the project to complete the project in twelve days. How many hours a day must the workers put each day, in order to complete the job on time?
Mathematics
1 answer:
andrew-mc [135]3 years ago
5 0

Answer:

10

Step-by-step explanation:

10 because you have to do the first problem first. 6 people × 8 hours = the total of 48 then times the days (20) and get the answer of 960. Then what you do is 960 and divide it by 12 and get 80 then divide that by 8 getting the answer of 10

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postnew [5]
I am using the Descartes Rule of Signs.

f(x) = 3x^4 - 5x³ - x² - 8x + 4

positive zero: 2 or 0.
x = + - - +
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negative zero: 1.

f(-x) = 3(-x^4) - 5(-x³) - (-x²) - 8(-x) + 4
f(-x) = 3x^4 + 5x³ - x² + 8x + 4

-x = + + - + +

there is only 1 change of sign. - to +.

There are 2 or 0 positive solutions and 1 negative solution. 






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3 years ago
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Step-by-step explanation:

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2 years ago
The area of the rectangle is 49 square units.
Ilia_Sergeevich [38]

Answer:

\boxed{70 \ \text{units}^{2}}

Step-by-step explanation:

<em>I assume that the </em><u><em>polygon</em></u><em> is made up of a </em><em>rectangle</em><em> and </em><em>two triangles. </em><em>Thus, the </em><em>area</em><em> of the </em><u><em>polygon</em></u><em> is the area of the </em><u><em>triangles</em></u><em> and the </em><u><em>rectangle.</em></u>

<em>≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡</em>

\text{Area of polygon} = \text{Area of rectangle} + \text{Area of triangle}_{1} }  + \text{Area of triangle}_{2}

➡ \text{Area of polygon}= 49 + 7 + 14

➡ {\bold{Area \ of\  polygon = 49 + 21 = \underline{70 \ units}^{2}}

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3 0
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