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Yuki888 [10]
2 years ago
15

Use a half-angle formula to find the exact value of the expression.

Mathematics
1 answer:
NARA [144]2 years ago
5 0

Step-by-step explanation:

The answer is

\sqrt{2}  - 1

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-8x+5-2x-4+5x when x=2
julia-pushkina [17]

Answer:

-9

Step-by-step explanation:

Just substitute in 2 for x

-8(2) + 5 - 2(2) - 4 + 5(2)

-16 + 5 - 4 - 4 + 10

-11 - 4 - 4 + 10

-15 - 4 + 10

-19 + 10

-9

Hope this helps!!!

-Unicorns110504

*Please mark brainliest*

7 0
2 years ago
Read 2 more answers
Classify the figure in as many ways as possible.
Dima020 [189]
The answer is D.

This figure has 4 sides which makes it a quadrilateral.

This figure has 2 sets of parallel sides which makes it a parallelogram.

This figure has 4 equal sides which makes it a rhombus.

This figure has 4 right angles which makes it a rectangle.

And this figure has both 4 equal sides and 4 equal angles which makes it a square.

To make it easier, all squares are: quadrilaterals, parallelograms, rhombuses, rectangles and of course squares.
3 0
3 years ago
2(6 − 2x) + 3x = 4 + 2(5 + x) what is x
alexira [117]
First let's get rid of the parenthesis:

12 - 4x + 3x = 4 + 10 + 2x

Now group the x's on the left and the numbers on the right

-4x + 3x - 2x = 4 + 10 - 12

...and simplify

-3x = 2

divide by -3 to isolate x

x = -2/3
5 0
2 years ago
What is the area of the following circle of the radius is 4=r
maria [59]

Answer:

50.24 (unit squared! cm2, m2, etc.)

Step-by-step explanation:

Area is: Pi x r^2

3.14 x 4^2 = 3.14 x 16 = 50.24

8 0
3 years ago
Read 2 more answers
How do i plug this in?
Temka [501]

Just jump the gun and multiply -7 and the value of d

-2[7x^2-24]-31

I got

-14x^2+17

as the total answer btw...

4 0
3 years ago
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