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3 years ago

When two times a number is decreased by 3 the result is 11 what is the number

Mathematics

2 answers:

sergiy2304 [10]3 years ago

5 0

Hi there!

Let's replace "a number" by "x":

- two times x = 2x

- decreased by 3 = -3

Here's what the equation should look like:

2x - 3 = 11

Now that you have written down your equation, all you have to do now is solve it for "x" by isolating it :

2x - 3 = 11

Add 3 on each side of the equation

2x = 14

Divide each side of the equation by 2

x = 7

Your answer is: The number is 7.

There you go! I really hope this helped, if there's anything just let me know! :)

Paraphin [41]3 years ago

4 0

2x - 3 = 11

Solve:

2x = 14

x = 7

The answer is 7

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3 years ago

A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 48.0 and 58.

Yanka [14]

Answer: 0.025

Step-by-step explanation:

Given : A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between the interval [48.0 minutes, 58.0 minutes].

The probability density function :-

$f(x)=\dfrac{1}{58-48}=\dfrac{1}{10}$

Now, the probability that a given class period runs between 50.25 and 50.5 minutes is given by :-

$\int^{50.5}_{50.25}\ f(x)\ dx\\\\=\int^{50.5}_{50.25}\ \dfrac{1}{10}\ dx\\\\=\dfrac{1}{10}|x|^{50.5}_{50.25}\\\\=\dfrac{1}{10}\ [50.5-50.25]=\dfrac{1}{10}\times(0.25)=0.025$

Hence, the probability that a given class period runs between 50.25 and 50.5 minutes =0.025

Similarly , the probability of selecting a class that runs between 50.25 and 50.5 minutes = 0.025

5 0

3 years ago

118 meters in 2 seconds, how many meters in 11 seconds?

erastova [34]

Answer:

It would be 649

Step-by-step explanation:

118 ÷ 2= 59

59 x 11= 649

3 0

3 years ago

Read 2 more answers

−11b+7=40<br> Like what am I supposed to do??

Nataly [62]

Answer:

The answer is 3

Step-by-step explanation:

First write the equation as you see it.

-11b+7=40

Then switch the take away seven from the left side then place it in the right side but as a minus.

-11b=40-7

Next do the math on the right side.

-11b=33

Once you have done that you divide the number on right with the number on the left which leaves you with the answer.

b=-3

Hope this helped :)

8 0

3 years ago

Helpppppppppppp.!!!!!!!!!!!!

elena55 [62]

Yes both rates are equivalent

6 0

3 years ago

Read 2 more answers