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3 years ago

√2x+13 = √x+31 what is the answer

Mathematics

1 answer:

vlada-n [284]3 years ago

6 0

Answer:

Step-by-step explanation:

Note that √2x = √2*√x, and so we have √2*√x + 13 = √x + 31.

First subtract 13 from both sides, obtaining: √2*√x = √x + 18.

Next, group the √x terms together: √2*√x - √x = 18.

Now solve this for √x. We get:

√x(√2 - 1) = 18, or

√x = --------------

(√2 - 1)

To find x, square both sides:

18^2

x = ---------------

(√2 - 1)^2

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4 over 9 divided by 2

Strike441 [17]

Answer:

$\frac{4}{9}\div 2=\frac{2}{9}$

Step-by-step explanation:

We want to simplify;

$\frac{4}{9}\div 2$

We can rewrite to get;

$\frac{4}{9}\div \frac{2}{1}$

We multiply the first fraction by the multiplicative inverse of the second fraction to get;

$\frac{4}{9}\times \frac{1}{2}$

This gives us;

$\frac{4\times1}{9\times2}$

Simplify to get;

$\frac{2\times1}{9\times1}$

Multiply;

$=\frac{2}{9}$

7 0

4 years ago

Read 2 more answers

Write <br> 6 <br> 1<br> 2<br> as an improper fraction.

kompoz [17]

Answer:

13/2

Step-by-step explanation:

you do 6*2=12+1=13 which gives ya 13/2

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3 0

4 years ago

The drama club at Math Academy High School sold tickets to their end of the year play. On Monday they sold 80 tickets for a tota

riadik2000 [5.3K]

Answer: OPTION A

Step-by-step explanation:

Let be "a" the number of adults tickets they sold and "s" the number student of tickets they sold.

With the information given in the exercise you can set up the following System of equations:

$\left \{ {{a+s=80} \atop {6a+4.5s=426}} \right.$

Use the Elimination method to solve the system of equations:

1. Multiply the first equation by -6.

2. Add the equations.

3. Solve for "s" in order to find its value.

Then:

$\left \{ {{-6a+-6s=-480} \atop {6a+4.5s=426}} \right.\\............................\\-1.5s=-54\\\\s=36$

4. Finally, substitute the value of "s" into the first equation and solve for "a":

$a+36=80\\\\a=80-36\\\\a=44$

3 0

4 years ago

Choose the irrational number.

Ganezh [65]

B. 1.18181818....

This is because this number has no end, and an irrational number does not have a terminating decimal

hope this helps

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3 years ago

Find the surface area of the regular pyramid

Dmitry_Shevchenko [17]

Answer:

64cm² will be your answer

Step-by-step explanation:

SA=4²+4(1/2)(4)(6)

SA=64cm²

hope it helps...

have a great day!!!

5 0

3 years ago