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mars1129 [50]
3 years ago
15

The table below shows two equations:

Mathematics
1 answer:
NikAS [45]3 years ago
5 0

Answer:

I think it is the last one

Step-by-step explanation:

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It would take Delia 3 hours longer to re tile their bathroom by herself than it would for kari to retile on her own. If they wor
max2010maxim [7]

Answer:

6hours

Step-by-step explanation:

From the given information:

Suppose it took Karl x hours to retile her bathroom,

Then it will take Della 3 hours longer i.e (3+x) hours

If Della and Karl work together or will take them 2 hours

The objective is to determine how long it will take Delia to retile the bathroom alone?

∴

\dfrac{1}{x}+\dfrac{1}{3+x}= \dfrac{1}{2}

\dfrac{x+3+x}{x(3+x)}= \dfrac{1}{2}

\dfrac{2x+3}{3x+x^2}= \dfrac{1}{2}

By cross multiplying, we have:

2(2x+3) = 3x+x²

4x + 6 = 3x + x²

3x + x² - 4x - 6

x² - x - 6 = 0

Using quadratic equation

x² -3x +2x - 6 = 0

x(x - 3) + 2(x - 3) = 0

(x +2) (x - 3) = 0

x + 2 = 0 or x - 3 = 0

x = -2 or x = 3

Since we are concerned about the positive integer,

Then, Karl = x = 3 hours while Della which is (3+x) = 3+3 = 6hours

6 0
3 years ago
Need help urgently, please
Kaylis [27]
Answer: 26

There’s nothing here for me to solve
3 0
3 years ago
Some doctors recommend that men drink 2.5 liters of water every day. There are approximately 29.8 millimeters in 1 fluid ounce.
krek1111 [17]

Answer:

A

Step-by-step explanation:

First step, convert liter to millimetres

1l - 1000mm

2.5 x 1000 = 2500 mm

2. convert mm to fluid ounce

2500 / 29.8 = 84

3 0
2 years ago
Use lagrange multipliers to find the maximum and minimum
kipiarov [429]
I need more information
8 0
2 years ago
In the coordinate plane, the x axis (y=0) and y axis (x=0) are perpendicular. The product of the slopes of two perpendicular lin
sleet_krkn [62]

Answer:

see the explanation

Step-by-step explanation:

we know that

If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)

In the coordinate plane, the x axis (y=0) and y axis (x=0) are perpendicular

however

this definition does not apply to the lines y=0 and x=0.

because

The slope of the horizontal line y=0 is equal to zero and the slope of the vertical line x=0 is undefined

8 0
3 years ago
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