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3 years ago

Help pls easy points 20

Mathematics

1 answer:

mart [117]3 years ago

6 0

Answer:

ahhhhhhhhhhhhhhhhh

Step-by-step explanation:

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Why does it take more centimeters than inches to measure the same distance?

MaRussiya [10]

Because 1 centimeter is smaller than 1 inch, so more centimeters than inches can fit in a given distance.

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3 years ago

Whats the property? If -7x=14 then 14=-7x

timofeeve [1]

Answer:

the answer is commutative property

Step-by-step explanation:

commutative property is when both constants or variables don't change value when you move them from one side of the equal sign to another such as "a+b = b+a" or " a=b; b=a" both examples do not change value

3 0

3 years ago

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baherus [9]

Answer: see proof below

<u>Step-by-step explanation:</u>

Given: cos 330 = $\frac{\sqrt3}{2}$

Use the Double-Angle Identity: cos 2A = 2 cos² A - 1

$\text{Scratchwork:}\quad \bigg(\dfrac{\sqrt3 + 2}{2\sqrt2}\bigg)^2 = \dfrac{2\sqrt3 + 4}{8}$

Proof LHS → RHS:

LHS cos 165

Double-Angle: cos (2 · 165) = 2 cos² 165 - 1

⇒ cos 330 = 2 cos² 165 - 1

⇒ 2 cos² 165 = cos 330 + 1

Given: $2 \cos^2 165 = \dfrac{\sqrt3}{2} + 1$

$\rightarrow 2 \cos^2 165 = \dfrac{\sqrt3}{2} + \dfrac{2}{2}$

Divide by 2: $\cos^2 165 = \dfrac{\sqrt3+2}{4}$

$\rightarrow \cos^2 165 = \bigg(\dfrac{2}{2}\bigg)\dfrac{\sqrt3+2}{4}$

$\rightarrow \cos^2 165 = \dfrac{2\sqrt3+4}{8}$

Square root: $\sqrt{\cos^2 165} = \sqrt{\dfrac{4+2\sqrt3}{8}}$

Scratchwork: $\cos^2 165 = \bigg(\dfrac{\sqrt3+1}{2\sqrt2}\bigg)^2$

$\rightarrow \cos 165 = \pm \dfrac{\sqrt3+1}{2\sqrt2}$

Since cos 165 is in the 2nd Quadrant, the sign is NEGATIVE

$\rightarrow \cos 165 = - \dfrac{\sqrt3+1}{2\sqrt2}$

LHS = RHS $\checkmark$

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4 years ago

What is 4x3x4x9 squared

Anni [7]

Answer:

186,624 I think

Step-by-step explanation:

4*3=12

12*4=48

48*9=432

$432^{2}$ = 186,624!

8 0

3 years ago

PLEASE ANSWER ASAP FOR BRAINESLT!!!!!!!!!!!!!!!!!!

Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

Circumference = Pi * radius^2

The radius is half of the diameter, 23.

5 0

3 years ago

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