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3 years ago

Need help with this math question pls help me will mark brainiest btw

Mathematics

2 answers:

MrRissso [65]3 years ago

4 0

Answer:

Zero

Step-by-step explanation:

Ugo [173]3 years ago

4 0

Answer:

<em>Answer: C. Zero</em>

Step-by-step explanation:

<u>The Slope of a Line</u>

Suppose we know a line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation:

$\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

The line shown in the image is horizontal, i.e. all of its points have the same y-coordinate regardless of their x-coordinate.

Take two random points on the line like (0,-2) and (2,-2), the slope is:

$\displaystyle m=\frac{-2+2}{2-0}=0$

The slope is zero

Answer: C. Zero

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Working alone at its constant rate, pump X pumped out ¼ of the water in a tank in 2 hours. Then pumps Y and Z started working an

madam [21]

Answer:

The correct option is B) 12.

Step-by-step explanation:

Consider the provided information.

Working alone at its constant rate, pump X pumped out ¼ of the water in a tank in 2 hours.

As we know: $rate =\dfrac{ work}{time}$ ,

The rate of pump X is $\frac{\frac{1}{4}}{2} = \frac{1}{8}$

$\frac{1}{4}$ of the water is pumped out of the tank, that means only $\frac{3}{4}$ is left to be pumped out.

All 3 pumps pumped out the remaining $\frac{3}{4}$ of the water out in 3 hours.

The combined rate of all three pumps is: $\frac{\frac{3}{4}}{3} = \frac{1}{4}$

Pump Y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water.

The rate of pump Y = $\frac{\frac{3}{4}}{18} = \frac{1}{24}$

Let z is the time taken by pump Z, then the rate of pump Z is $\frac{1}{z}$ .

Therefore,

$\dfrac{1}{8}+\dfrac{1}{24}+\dfrac{1}{z}=\dfrac{1}{4}$

Multiplying both sides by 24 z.

$3z + z + 24 = 6z\\24 = 2z\\12 = z$

Hence, the correct option is B) 12.

5 0

4 years ago

Please solve this equation

Sveta_85 [38]

Answer:

n = 62 degrees

Step-by-step explanation:

n = 180 - 118 = 62 degrees

4 0

3 years ago

Read 2 more answers

How many ways can 5 books be arranged on a shelf

Zielflug [23.3K]

There are very many ways to this!
We can have horizontal, vertical, some can be laying down wile others are standing up, some could be standing up and the others layed down on top of them etc.
but in this case it would be 120 ways.

3 0

3 years ago

A homeowner will put fencing around a rectangular garden that is 10 ft by 12 ft. How many linear feet of fence does he need?

dlinn [17]

Answer:

44 feet

Step-by-step explanation:

P = 10 + 12 + 10 + 12

P = 10(2) + 12(2)

P = 20 + 24

P = 44

6 0

3 years ago

Read 2 more answers

PLEASE HELP!!!!!!!!!!!!!!!!!

Lelechka [254]

x=4.75

6×4.75=28.5

15×4.75-12=59.25

19×4.75+2=92.25

28.5+59.25+92.25=180

m<MNI= 92.25

I think this is right. I hope that it was helpful:)

8 0

3 years ago