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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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Vikki [24]

Wouldn’t it be the 7th root of 3? It’s a 30 60 90 triangle which means x=7 on that side so x on the bottom is the x root of three?

4 0

3 years ago

Dos anyone know how much a is 2(a+7)-7=9

Oduvanchick [21]

Answer:

a =1

Step-by-step explanation:

2(a+7)-7=9

Add 7 to each side

2(a+7)-7+7=9+7

2(a+7)=16

Divide by 2

a+7 = 16/2

a +7 = 8

Subtract 7

a+7-7 = 8-7

a = 1

3 0

4 years ago

Read 2 more answers

Plz help

meriva

Answer:

70° is your measurement for ∠t.

Step-by-step explanation:

Note that a straight line has an angle of 180°

It is given to us that ∠r and ∠t = 180°, and that m∠r = 110°

Plug in 110 for ∠r

110 + ∠t = 180

Isolate ∠t. Note the equal sign, what you do to one side, you do to the other. Subtract 110 from both sides

110 (-110) + ∠t = 180 (-110)

∠t = 180 - 110

∠t = 70

70° is your measurement for ∠t.

6 0

3 years ago

the circumference of the circle shown below is 54 centimeters. which expression gives the length in centimeters of XY?

g100num [7]

Answer:

The correct option is C

Step-by-step explanation:

Given the circumference of circle which is 54 cm and also the measure of arc XY is 120°

we have to find the expression for arc length of XY

The arc length can be calculated by the formula

$\frac{\theta}{360}\times 2\pi r$

$\frac{\theta}{360}\times circumference$

$\frac{120}{360}\times 54$

Hence, option C is correct

4 0

3 years ago

Read 2 more answers

Solve the equation 6+(c+8)=136-(c+8)-131+7(t+2)=854(A+4)-9(A-4)=3711=7-(1-y)3+7(p-10)= -38-(5-3p)20+5(3-5A)=-5(A-6)+5

marissa [1.9K]

Let's solve the next equation:

$6+(c+8)=13$

We need to find the value for c, this value is correct when we replaced it with a number and the equality equation becomes true.

First, subtract both sides by 6

$6-6+(c+8)=13-6$ $c+8=7$

Now, subtract both sides by 8

$c+8-8=7-8$ $c=-1$

Replacing the c value to verify:

$6+(-1+8)=13$ $6+7=13$

The c value is correct.

5 0

1 year ago