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3 years ago

What are all equivalent to 10+2x+5y+3x

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

8 0

10+5x+5y is the simplified version

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What is the value of (–4)–3?

son4ous [18]

Here you go. Good luck!

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3 years ago

I need help I did most of them but not sure if there right if you could tell me that would be great. Also can you help me with 9

Andrej [43]

Explanation:

In the given identified the following with reasons.

1. Given

2. Corresponding Angles postulate

3. Reflexive property of congruence

4. AA similarity postulate.

5. Triangle proportionate

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7. Distributive property of equality

8. Subtraction property of equality

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10. Prove

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3 years ago

How many significant figures are there in the number 3,002.1?

Rzqust [24]

Answer:

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Step-by-step explanation:

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3 years ago

Evalute costheta if sintheta = (sqrt5)/3

torisob [31]

Answer:

$\large\boxed{\cos\theta=\pm\dfrac{2}{3}}$

Step-by-step explanation:

Use $\sin^2x+\cos^2x=1$ .

We have

$\sin\theta=\dfrac{\sqrt5}{3}$

Substitute:

$\left(\dfrac{\sqrt5}{3}\right)^2+\cos^2\theta=1\qquad\text{use}\ \left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\\\\dfrac{(\sqrt5)^2}{3^2}+\cos^2\theta=1\qquad\text{use}\ (\sqrt{a})^2=a\\\\\dfrac{5}{9}+\cos^2\theta=1\qquad\text{subtract}\ \dfrac{5}{9}\ \text{from both sides}\\\\\cos^2\theta=\dfrac{9}{9}-\dfrac{5}{9}\\\\\cos^2\theta=\dfrac{4}{9}\to \cos\theta=\pm\sqrt{\dfrac{4}{9}}\\\\\cos\theta=\pm\dfrac{\sqrt4}{\sqrt9}\\\\\cos\theta=\pm\dfrac{2}{3}$

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3 years ago

Read 2 more answers

Solve x to the 3rd power = 1/8

Sav [38]

1/2 because 2*2*2 equals 8 so all you do is put it in fraction form. 1/2*1/2*1/2= 1/8

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3 years ago