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FrozenT [24]
3 years ago
13

3 people work for 40 hours, 1 person allocate 20 hours the second person allocate 1/3 of the time what is left for the third per

son?
Mathematics
1 answer:
agasfer [191]3 years ago
4 0

Answer:

6.666...

Step-by-step explanation:

you add twenty to a third of forty and then you get 33.3333... and then you add 6.6666...

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−30=5(x+1) please simplify this for khan academy. org
brilliants [131]

Answer:

-7 =x

Step-by-step explanation:

−30=5(x+1)

Divide each side by 5

−30/5=5/5 (x+1)

-6 = x+1

Subtract 1 from each side

-6-1 = x+1-1

-7 =x

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3 years ago
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3.5× 1.5× 2 into a mixed number
soldi70 [24.7K]

Answer: 10.5

Step-by-step explanation:

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Complete the steps to solve the polynomial equation x3 – 21x = –20. According to the rational root theorem, which number is a po
jeka94

Answer:

Zeroes : 1, 4 and -5.

Potential roots: \pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20.

Step-by-step explanation:

The given equation is

x^3-21x=-20

It can be written as

x^3+0x^2-21x+20=0

Splitting the middle terms, we get

x^3-x^2+x^2-x-20x+20=0

x^2(x-1)+x(x-1)-20(x-1)=0

(x-1)(x^2+x-20)=0

Splitting the middle terms, we get

(x-1)(x^2+5x-4x-20)=0

(x-1)(x(x+5)-4(x+5))=0

(x-1)(x+5)(x-4)=0

Using zero product property, we get

x-1=0\Rightarrow x=1

x-4=0\Rightarrow x=4

x+5=0\Rightarrow x=-5

Therefore, the zeroes of the equation are 1, 4 and -5.

According to rational root theorem, the potential root of the polynomial are

x=\dfrac{\text{Factor of constant}}{\text{Factor of leading coefficient}}

Constant = 20

Factors of constant ±1, ±2, ±4, ±5, ±10, ±20.

Leading coefficient= 1

Factors of leading coefficient ±1.

Therefore, the potential root of the polynomial are \pm 1, \pm 2, \pm 4, \pm 5, \pm 10, \pm 20.

3 0
3 years ago
-1/2 + 2. What is the solution to this problem
andriy [413]
-1/2 + 2 = 1.5 
because if u add 2 to a minus half it goes 0 and then 1.5 (positive half)
8 0
3 years ago
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How do you write 7/10 as a decimal Can someone please help me!!
insens350 [35]

Answer:

0.7

Step-by-step explanation:

To get 7/10 as a decimal you simply divide 7 by 10 which gets you 0.7.

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3 years ago
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