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3 years ago

A line is graphed to show the relationship between the number of words typed and the time Mary spends on a typing test.

Mathematics

2 answers:

Furkat [3]3 years ago

8 0

The answer to your question is : The value of y increases by 40 for each increase of 1 by x .

Things you could of looked out for:
A. is wrong because 40 isn't plotted on the x-value
C and D are wrong because there isn't 140 plotted on either.

Hope this helps you!

Ilya [14]3 years ago

7 0

Thanks for including the graph!

Okay, so -

From examining the graph, we can see that for every minute the number of words increases by 40.

Now, since the x axis (the horizontal thingy kabob at the bottom) is time, and the y axis (the vertical thingy kabob) is the number of words - we can conclude that the answer is B!

Just remember that the value of the y axis is dependent on the value of the x axis. Also, note that x almost always represents time!

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Solve for x -2x + 4 = 6x - 12

aleksklad [387]

Answer:

x=2

Step-by-step explanation:

-2x+4=6x-12 Add 2x to both sides.

+2x +2x

4=8x-12 Add 12 to both sides.

+12 +12

16=8x Divide by 8 on both sides.

/8 /8

2=x

Hope this helps you out and have a great day (～^▽^)～

5 0

2 years ago

Read 2 more answers

If y=e5t is a solution to the differential equation

a_sh-v [17]

Answer:

k = 30, $y(t) = C_1e^{5t}+C_2e^{6t}$

Step-by-step explanation:

Since $y=e^{5t}$ is a solution, then it must satisfy the differential equation. So, we calculate the derivatives and replace the value in the equation. We have that

$\frac{d^2y}{dt^2} = 25 e^{5t},\frac{dy}{dt} = 5e^{5t}$

Then, replacing the derivatives in the equation we have:

$25e^{5t}-11(5)e^{5t}+ke^{5t}=0 e^{5t}(25-55+k) =0$

Since $e^{5t}$ is a positive function, we have that

$25-55+k = 0 \rightarrow k = 30$ .

Now, consider a general solution $y(t) = Ae^{rt}, A \in \mathbb{R}$ , then, by calculating the derivatives and replacing them in the equation, we get

$Ae^{rt}(r^2-11r+30)=0$

We already know that r=5 is a solution of the equation, then we can divide the polynomial by the factor (r-5) to the get the other solution. If we do so, we get that (r-6)=0. So the other solution is r=6.

Therefore, the general solution is

$y(t) = C_1e^{5t}+C_2e^{6t}$

8 0

2 years ago

Pls help me answer this :'( !!

alekssr [168]

Answer:

28 inches

Step-by-step explanation:

28×22/7×28

answer will come

7 0

2 years ago

Read 2 more answers

8x - 2 + 4x + 10 + 3x + 5 = 180

erik [133]

Answer: $11\frac{2}{15}$

Step-by-step explanation:

What you are trying to do is isolate the variable x. For you to do that you have to first simplify the left side of the equation and then you solve for x.

5 0

2 years ago

Do what it says on the image (NO SPAM LINKS!!)

Gennadij [26K]

Answer:

The answer is B.

Step-by-step explanation:

Hope this helps!

6 0

1 year ago