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lozanna [386]
3 years ago
10

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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Step-by-step explanation:

Circumference of the circle is the distance around the circle.

Formula used:

C = 2\pi r

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r is radius of circle

Given:

Radius of circle = 8.5 cm

Now putting all the given values in the above formula, we get:

C = 2\pi r\\C=2\times 3.14\times 8.5cm\\C=53.38cm

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2 years ago
What is log base 7 of 252
rjkz [21]

Answer:

2.84

Step-by-step explanation:

Recognize that 252 = 7*36

and so:

log base 7 of 252 = log base 7 of 36 + log base 7 of 7, or

                                 log base 7 of 36 + 1

So the most you can simplify log base 7 of 252 is to write 1 + log base 7 of 36.

Or, if you want to use the change of base formula, you could do the following:

                                 log 36

log base 7 of 36 = -------------- = 1.84

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and so log base 7 of 252 would come out to

1 + log base 7 of 36  =  1 + 1.84  = 2.84

Check:  does 7^2.84 = 252?  YES.  So we know that:

 1 + log base 7 of 36 = 2.84

4 0
3 years ago
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