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3 years ago

Determine whether each expression is equivalent to x3−25x. Select Yes or No for each expression.

Mathematics

1 answer:

dem82 [27]3 years ago

5 0

Answer:

I’m so sure, but I’ll try.

1. Yes

2. No

3. No

4. Yes

5. No

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Express the following in simplest a + bi form.

viktelen [127]

Answer:

3+6i

Step-by-step explanation:

3 0

3 years ago

If x= sin theta then x/√1-x^2 is

SCORPION-xisa [38]

Well,

Given that $x=\sin(\theta)$ ,

We can rewrite the equation like,

$\dfrac{\sin(\theta)}{\sqrt{1-\sin(\theta)^2}}$

Now use, $\cos(\theta)^2+\sin(\theta)^2=1$ which implies that $1-\sin(\theta)^2=\cos(\theta)^2$

That means that,

$\dfrac{\sin(\theta)}{\sqrt{1-\sin(\theta)^2}}\Longleftrightarrow\dfrac{\sin(\theta)}{\sqrt{\cos(\theta)^2}}$

By def $\sqrt{x^2}=x$ therefore $\sqrt{\cos(\theta)^2}=\cos(\theta)$

So the fraction now looks like,

$\dfrac{\sin(\theta)}{\cos(\theta)}$

Which is equal to the identity,

$\boxed{\tan(\theta)}=\dfrac{\sin(\theta)}{\cos(\theta)}$

Hope this helps.

r3t40

6 0

3 years ago

<img src="https://tex.z-dn.net/?f=what%2060%20twenty-fives%20minus%201%20twenty%20five%20%5C%5Cin%20word%20from" id="TexFormula1

Papessa [141]

I think it’s uh lster

4 0

3 years ago

Please help thank you :) brainliest?

dybincka [34]

Answer:

VXY = 38 degrees

YXW = 19 degrees

Step-by-step explanation:

The line XY is a angle bisector, meaning it divides the angle in half. YXW is the angle between the XY and XW lines. Which we know is 19 degrees.

Since we know the XY line divides the angle in half, we know VXW is also 19 degrees.

Therefore, VXW would be the sum of VXY and YXW: 19 + 19 = 38.

5 0

3 years ago

How many 3-digit numbers exist, whose digits are distinct even numbers.

skad [1K]

Answer:

328

Step-by-step explanation:

If z is 0, then x has 9 choices. Therefore, z and x can be chosen in (1 × 9) + (4 × 8) = 41 ways. For each of these ways, y can be chosen in 8 ways. Hence, the desired number is 41 × 8 = 328 numbers 3-digit even numbers exist with no repetitions.

7 0

4 years ago

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