3 years ago

3.Which of the following is not a plane figure?

Mathematics

1 answer:

Galina-37 [17]3 years ago

6 0

Answer:

I'm not sure about the other ones but I'm pretty sure 4 is cube

You might be interested in

What is the relationship?

Studentka2010 [4]

What do you think and what have you previously learned on the subject?

8 0

4 years ago

What is m _BEC OB) 70° OA) 65° OD) 120° OC) 50°

just olya [345]

Answer:

C) 50°

Step-by-step explanation:

$m\angle BEC= 180\degree-(65\degree+65\degree)$

$\implies m\angle BEC= 180\degree-130\degree$

$\implies m\angle BEC= 50\degree$

5 0

2 years ago

A holiday costs £1900. Work out the price after a 9% discount.

Svetradugi [14.3K]

Answer:

$1729

Step-by-step explanation:

$\frac{100-9}{100} * 1900$

7 0

3 years ago

Read 2 more answers

What is the value of the expression 2,160/30

tester [92]

Answer:

Step-by-step explanation:

8 0

3 years ago

ASAP! I really need help with this question! No nonsense answers, and please attach the solution.

uysha [10]

Answer:

$\boxed{\sf Option \ 4}$

Step-by-step explanation:

$\sqrt{2x-3} +x=3$

Subtract x from both sides.

$\sqrt{2x-3} +x-x=-x+3$

$\sqrt{2x-3}=-x+3$

Square both sides.

$( \sqrt{2x-3})^2 =(-x+3)^2$

$2x-3=x^2-6x+9$

Subtract x²-6x+9 from both sides.

$2x-3-(x^2-6x+9 )=x^2-6x+9-(x^2-6x+9)$

$-x^2 +8x-12=0$

Factor left side of the equation.

$(-x+2)(x-6)=0$

Set factors equal to 0.

$-x+2=0\\-x=-2\\x=2$

$x-6=0\\x=6$

Check if the solutions are extraneous or not.

Plug x as 2.

$\sqrt{2(2)-3} +2=3\\ \sqrt{4-3} +2=3\\\sqrt{1} +2=3\\3=3$

x = 2 works in the equation.

Plug x as 6.

$\sqrt{2(6)-3} +6=3\\ \sqrt{12-3} +6=3\\\sqrt{9} +6=3\\3+6=3\\9=3$

x = 6 does not work in the equation.

5 0

4 years ago

Read 2 more answers