3 years ago

Is the sum of 3√2 and 4 √2 rational or irrational? Explain your answer.

Mathematics

1 answer:

djverab [1.8K]3 years ago

8 0

The answer is irrational. Any irrational number doubled is still irrational.

You might be interested in

What integer does Point B represent?<br> B<br> D<br> 0<br> Point B

just olya [345]

I think it’s -4 but i’m not sure

6 0

2 years ago

Read 2 more answers

Work out the value of z, given that x+y=42 and x/13=y/8=z/9.

Andru [333]

Answer:

z = 18

x = 26 and y = 16

Step-by-step explanation:

Given:

$x + y = 42$

$\dfrac{x}{13}=\dfrac{y}{8}=\dfrac{z}{9}$

Rewrite $x + y = 42$ to make $y$ the subject:

$\implies y=42-x$

Substitute this into $\dfrac{x}{13}=\dfrac{y}{8}$ :

$\implies \dfrac{x}{13}=\dfrac{42-x}{8}$

Cross multiply:

$\implies 8x=13(42-x)$

$\implies 8x=546-13x$

$\implies 21x=546$

$\implies x=26$

Substitute found value of x into $x + y = 42$ and solve for y:

$\implies 26 + y = 42$

$\implies y=16$

Substitute found value of y into $\dfrac{y}{8}=\dfrac{z}{9}$ and solve for z:

$\implies \dfrac{16}{8}=\dfrac{z}{9}\\\\\implies 2=\dfrac{z}{9}\\\\\implies 18=z$

4 0

2 years ago

WILL GIVE BRAINLIEST

ss7ja [257]

40 hjskvjxkenfkxksmfkkfmcfm

3 0

2 years ago

An insect is 3.5 millimeters long. Which expression finds the length of the insect in decimeters? Use the metric table to help a

Katarina [22]

Answer:

is b

Step-by-step explanation:

youre welcome

7 0

2 years ago

Read 2 more answers

Find the length of a diagonal of a square if its area is 162 square feet.

bearhunter [10]

Answer:

9sqrt(2) ft or 12.73 ft

Step-by-step explanation:

A = L^2

sqrt(162) = 9sqrt(2)

The diagonal of a square is equal to the side length.

5 0

2 years ago