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2 years ago

PLEAS ASAP i wanna sleep im young 30 POINTS

Mathematics

1 answer:

lyudmila [28]2 years ago

5 0

Answer:

325.5 i think

Step-by-step explanation:

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Between which two integers can the square root of 15 be found?

Taya2010 [7]

Answer:

3 and 4

Step-by-step explanation:

Consider squares on either side of 15, that is 9 and 16, so

$\sqrt{9}$ < $\sqrt{15}$ < $\sqrt{16}$ , that is

3 < $\sqrt{15}$ < 4

3 0

3 years ago

Read 2 more answers

What are the coordinates of A’, the image of A(-7, 9), after a rotation of -180° about the origin?

Dmitry_Shevchenko [17]

Answer:

7,-9

Step-by-step explanation:

4 0

3 years ago

Solve the system of linear equations for x and y.(cos θ)x + (sin θ)y=1(−sin θ)x + (cos θ)y = 0x=y=

lys-0071 [83]

Answer:

$\bold{x =cos\theta}\\\bold{y=sin\theta}$

Step-by-step explanation:

The given system of linear equations is:

$(cos\theta)x+(sin\theta)y=1\\(-sin\theta)x+(cos\theta)y=0$

We have to solve the equations for the values of $x, y$ .

Let us use elimination method in which we eliminate one of the variables from the two variables.

For this, let us multiply the first equation by $sin\theta$ and second equation by $cos\theta$

Now, the equations become:

$(cos\theta.sin\theta)x+(sin\theta.sin\theta)y=sin\theta\\\Rightarrow (cos\theta.sin\theta)x+(sin^2\theta)y=sin\theta ....... (1)\\\\(-sin\theta.cos\theta)x+(cos\theta.cos\theta)y=0\\\Rightarrow (-sin\theta.cos\theta)x+(cos^2\theta)y=0 ..... (2)$

Now, let us add (1) and (2):

$(sin^2\theta)y+(cos^2\theta)y=sin\theta\\\Rightarrow (sin^2\theta+cos^2\theta)y=sin\theta\\\Rightarrow (1)y=sin\theta\\\Rightarrow y = sin\theta$

Using the equation:

$(-sin\theta)x+(cos\theta)y=0$

Putting value of $y$ :

$\Rightarrow (-sin\theta)x+(cos\theta)sin\theta=0\\\Rightarrow (sin\theta)x=(cos\theta)sin\theta\\\Rightarrow x = cos\theta$

So, the answer to the system of linear equations is:

$\bold{x =cos\theta}\\\bold{y=sin\theta}$

7 0

2 years ago

A research report says that t(63) = 1.99; p = .03. From that information, can you reject the null hypothesis with 95% confidence

Leona [35]

Answer:

Yes, I can reject the null hypothesis with 95% confidence.

Step-by-step explanation:

Critical value t(63) = 1.99

p-value = 0.03

Confidence level (C) = 95% = 0.95

Significance level = 1 - C = 1 - 0.95 = 0.05

Conclusion:

Reject the null hypothesis because the p-value 0.03 is less than the significance level 0.05.

4 0

2 years ago

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Angie painted 1/20 of a fence in 1/2 an hour.How much of the fence can be painted in one hour?

nata0808 [166]

Answer:

1/10

Step-by-step explanation:

If she painted 1/20 of a fence in 1/2 hour she can paint another 1/20 of the fence in another 1/2 hour.

1/20 + 1/20 = 2/20 = 1/10

6 0

3 years ago