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3 years ago

PLZZ HELP ASAP ON 1 AND 2.a. AND 2.b.

Mathematics

1 answer:

dlinn [17]3 years ago

6 0

Kind of a mess but let me know if you want me to explain more

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PLEASE HELP ME!! I WILL GIVE BRAINLIEST!! Find the output, y, when the input, x, is -5.

Ivan

Answer:

$\boxed{y = -2}$

Step-by-step explanation:

Hey there!

To find y when x is -5 we go to -5 on the x-axis.

When at -5 find where the blue line is vertical to -5,

which is -2.

Hope this helps :)

4 0

4 years ago

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I need to solve question 3

AlexFokin [52]

3) 3.sec² Ф = 4.tan² Ф
but sec² Ф = 1/cos² Ф
3/cos² Ф = 4.tan² Ф
3/4 = (tan² Ф).(cos² Ф) ; tan² Ф = sin² Ф/cos² Ф

3/4 = (sin² Ф)x(cos² Ф)/(cos² Ф)

sin² Ф = 3/4

a) sin Ф = +(√3)/2 and b) sin Ф = - (√3)/2

sin Ф = + - (√3)/2 → Ф =π/3 + kπ/3

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3 years ago

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is µd =

ahrayia [7]

Answer:

d: 2, 4, -6, 0, -1, -5, 0, 1

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{29}{8}=-0.625$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =3.378$

The next step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{-0.625 -0}{\frac{3.378}{\sqrt{8}}}=-0.523$

And the correct option would be:

a. t = -0.523

Step-by-step explanation:

We assume the following notation:

x=test value after , y = test value before

x: 34 39 28 33 27 23 35 33

y: 32 35 34 33 28 28 35 32

The system of hypothesis for this case is given by:

Null hypothesis: $\mu_y- \mu_x = 0$

Alternative hypothesis: $\mu_y -\mu_x \neq 0$

The first step is calculate the difference $d_i=y_i-x_i$ and we obtain this:

d: 2, 4, -6, 0, -1, -5, 0, 1

The second step is calculate the mean difference

$\bar d= \frac{\sum_{i=1}^n d_i}{n}= \frac{29}{8}=-0.625$

The third step would be calculate the standard deviation for the differences, and we got:

$s_d =\frac{\sum_{i=1}^n (d_i -\bar d)^2}{n-1} =3.378$

The next step is calculate the statistic given by :

$t=\frac{\bar d -0}{\frac{s_d}{\sqrt{n}}}=\frac{-0.625 -0}{\frac{3.378}{\sqrt{8}}}=-0.523$

And the correct option would be:

a. t = -0.523

5 0

4 years ago

Each week, Mr. Jones goes to the grocery store. Mr. Jones estimates that he will spend $120 when he goes he spends $94

Ratling [72]

What is the complete question, I cannot work out the answer without there being a real problem, but I'll do my best,
If you are trying to do 120 - 94 then the answer will be a simple 26.
Thai is all I can do without specific information, im sorry.

6 0

4 years ago

Which geometric object is defined as the set of all points in a plane that are equidistant from the two sides of a given angle ?

LenaWriter [7]

Answer:

Bisector of an angle - B.

3 0

3 years ago

Read 2 more answers