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3 years ago

Tim and Jim are working on a school project together. If he had to work by himself, it would take

Mathematics

1 answer:

Vladimir [108]3 years ago

4 0

Answer: 6 hours

Step-by-step explanation:

Given, Tim and Jim are working on a school project together.

Tim takes 10 hours to complete the school project.

If Jim worked alone, it would take him 15 hours

Let t be the time they both take if they work together.

Then, $\dfrac{1}{t}=\dfrac{1}{\text{Time taken by Tim}}+\dfrac{1}{\text{Time taken by jim}}$

$\Rightarrow\ \dfrac{1}{t}=\dfrac{1}{10}+\dfrac{1}{15}\\\\\Rightarrow\ \dfrac{1}{t}=\dfrac{3+2}{30}=\dfrac{5}{30}\\\\\Rightarrow\dfrac{1}{t}=\dfrac{1}{6}\\\\\Rightarrow t=6$

So, it will take 6 hours to complete the school project together .

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Differentiate Square numbers and cube numbers

pashok25 [27]

Answer:

square numbers are numbers raised up to the power of two in essence the number multiplied by it self

6 0

3 years ago

John has × marbles and max has twice as many.max give gives john 5 of his marbles does max now have

rjkz [21]

Answer: 2x -5

Step-by-step explanation:

Hi, to answer this question we have to write equations with the information given:

John has × marbles

John=x

Max has twice (multiplied by 2) as many.max give gives john 5 of his marbles.

We have to multiply by 2 the number of marbles that John has (x), and subtract 5.

Max = 2x -5

Feel free to ask for more if needed or if you did not understand something.

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3 years ago

Find equation of a line through 5 -3 that is parallel to y=1/2x+3

xxTIMURxx [149]

Answer:

The equation of a line through (5 -3) that is parallel to y = 1/2 x+3 is

y = - 2 x + 7

Step-by-step explanation:

Let us assume the slope of the line whose equation we need to find is m 1.

The line parallel to the needed line is: y=1/2x+3

Comparing it with the general form: y = m x + C

we get m 2 = 1/2

Now, as Line 1 is Perpendicular to Line 2.

⇒ m 1 x m 2 = -1

⇒ m 1 x ( 1/2) = -1

⇒ m 1 = - 2

Also, the point son the line 1 is given as: (x,y) = (5,-3)

Put the value of point and Slope in y = m x + C to find the value of Y- INTERCEPT.

we get: -3 = (-2) (5) + C

or, C = -3 + 10 = 7

⇒ C = 7

The general line equation is given as: y = m x + C

Substituting the values of C and m, we get:

y = - 2 x + 7

Hence, the equation of a line through 5 -3 that is parallel to y = 1/2 x+3 is

y = - 2 x + 7

8 0

3 years ago

Seven less than the quotient of a number, x, and twelve is five times the number. Which answer represents this situation??

erica [24]

Answer:

Option b is correct.

Step-by-step explanation:

From the given condition : Seven less than the quotient of a number, x, and twelve is five times the number.

Here, the number is x

The quotient of a number x and twelve is expressed as , $\frac{x}{12}$

Seven less than the quotient of a number, x, and twelve is expressed as, $\frac{x}{12}-7$

Five times the number mean, $5x$

Therefore, we have an equation in the form of x from the given condition as:

$\frac{x}{12}-7=5x$ .

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3 years ago

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Solve and i give brainliest

Temka [501]

Answer:

0.25

Step-by-step explanation:

-9/6 divided by 3/-2 = 0.25

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2 years ago

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