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3 years ago

The graph below shows four straight lines, W, X, Y, and Z.

Mathematics

2 answers:

rosijanka [135]3 years ago

6 0

The answer is X- the gradient is +5, and the line goes through +5 on the graph

Digiron [165]3 years ago

3 0

The y intercept (when x = 0) is at y=5 as y=3(0) + 5 allows y to equal 5. Therefore the answer is line x as it also goes through 5 when x = 0

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When two computers are working together, they can finish updating software in 9 minutes. How long would they take individually t

tensa zangetsu [6.8K]

First computer takes x min. For 1 min it does 1/x part of work.

Second computer takes (x+24) min. For one min it does 1/(x+24) part of work.

Both computers for one min do (1/x+1/(x+24)) part of work.

At the same time, both computers for one min do 1/9 part of work.

$\frac{1}{x} + \frac{1}{x+24} = \frac{1}{9} 
\\ \\ \frac{x+24+x}{x(x+24)} = \frac{1}{9} 
\\ \\9(2x+24)=x^{2} +24x
\\ \\ 18x+216=x^{2} +24x
\\ \\ x^{2}+6x-216=0
\\ \\ D=b^{2}-4ac=36+4*216 = 900
\\ \\ x= \frac{-b+/- \sqrt{D} }{2a} = \frac{-6+/-30}{2} 
\\ \\ x_{1}=-18, x_{2}=12

We can use only positive number here. So, 

for the first computer x=12 min,

 for second computer x+24=12+24= 36 min

Answer 12 min and 36 min.$

7 0

3 years ago

2 hundredth _ thousandth

grandymaker [24]

Answer:

please give more information!

Step-by-step explanation:

8 0

3 years ago

10. Convert 600 feet per minute to miles per hour.

9966 [12]

Answer: 6.81818

Step-by-step explanation:

4 0

3 years ago

A tube of toothpaste holds 75 ml.

Slav-nsk [51]

Answer:

40 tubes

Step-by-step explanation:

1 liter = 1,000 milliliters

2 liters = 2,000 milliliters

3 liters = 3,000 milliliters

A tube of toothpaste = 75 ml

How many tubes can be filled using 3 litres of toothpaste?

Let

x = number of tubes

x tubes of toothpaste = 3000 ml

x = 3000 ml / 75 ml

x = 40

x = number of tubes = 40 tubes

4 0

3 years ago

What is the slope of the line passing through the points (−1, 7) and (4, −1)?

Damm [24]

Hey!

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Formula: $m = \frac{y2 - y1}{x2 - x1}$

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Steps To Solve:

~Substitute

$m = \frac{-1 - 7}{4 - (-1)}$

~Simplify

$m = \frac{-8}{5}$

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Answer:

$\large\boxed{C)~\frac{-8}{5} }$

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Hope This Helped! Good Luck!

3 0

3 years ago

Read 2 more answers