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Troyanec [42]
3 years ago
8

At the beginning the water level is at 12.6m . Each hour it decreases 0.4cm . How many hours does it take for all of the water t

o evaporate?
Mathematics
1 answer:
kompoz [17]3 years ago
8 0

Answer:

First you want to ensure you are working with the same units

In this case I will change the 12.6m to cm

12.6m --> 1260cm

1260 / 0.4 = 3150 hours

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Based on the tables, at what point do the lines y = 3x - 2 and y = -5x - 10 intersect?
Pepsi [2]
Intersect at where x=x and y=y
see where they have the same x and y values
that is at x=-1 and y=-5
intersect at (-1,-5)
8 0
3 years ago
Need help please asp thank you so much
Aneli [31]

Answer:

x = -1, 3

Step-by-step explanation:

so what you need to do is graph each one because that's what the questions ask. One way for you to check your answer is to set the two equations equal to each other.

-x + 5 = x^2 - 3x + 2

you want to end up with one equation and having the equation equal 0. So add x to both sides to cancel out the x on the left side and then subtract 5 from both sides to cancel out the 5 on the left side.

0 = x^2 - 2x - 3

now you factor

0 = (x - 3) (x + 1)

x = -1, 3

3 0
4 years ago
Please help me with this
Ne4ueva [31]

Answer:

Option c

Step-by-step explanation:

A system of equations are given to us. And we need to solve them . The given system is

\begin{cases} y = 2x - 3\dots 1 \\ y = x^2 - 3\dots 2 \end{cases}

We numbered the equations here . Now put the value of equation 1 in equation 2 that is substituting y = 2x - 3 in eq. 2 .

\implies y = x^2 - 3 \\\\\implies 2x - 3 = x^2 - 3 \\\\\implies x^2 - 2x = 0 \\\\\implies x(x-2) = 0 \\\\\implies\red{ x = 0 , 2 }

We got two values of x as 0 & 2 . Alternatively substituting these values we have ,

\implies y = 2 x - 3 \\\\\implies y = 2(0)-3 \qquad or \qquad y = 2(2)-3 \\\\\implies y = 0-3 \qquad or \qquad 4 - 3 \\\\\implies \red{ y = -3 , 1 }

Thefore the required answer is ,

\red{Option\:c} \begin{cases} (0,-3) \\ (2,1) \end{cases}

4 0
3 years ago
Read 2 more answers
Which of these numbers are irrational? A) 4.3 B) -5/9 C) 1.618 D) _/6
gavmur [86]

Answer: Its C

Step-by-step explanation:

Well, this irrational, or never-ending, ratio starting with 1.618 has been given many names over the years including the “golden ratio” and the “divine proportion”.

0verall what im trying to say is, its c

4 0
3 years ago
Please I need someone to help my assignment​
Artemon [7]

Answer:

1) 20: 25

2) 15: 3

Step-by-step explanation:

5 0
3 years ago
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