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Dvinal [7]
3 years ago
12

Simplify 2.15j+2.25-1.5j+3

Mathematics
1 answer:
Galina-37 [17]3 years ago
3 0
2.15j+2.25-1.5j+3
use like terms to lower the numbers u have
1+2.25+3
now just add
9.25
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Find the slope of a line through the given points
Ostrovityanka [42]
Use the formula\frac{ y_{2} - y_{1} }{ x_{2}- x_{1}  }
In this case: \frac{-2-4}{1--1}

You should get -3 when you simplify further.
3 0
3 years ago
In triangle JKL, tan(b°) = 3/4 and cos(b°) =4/5. If triangle JKL is dilated by a scale factor of 1/2, what is sin(b°)?
zysi [14]

Answer:

\sin (b^\circ)=\dfrac{3}{5}.

Step-by-step explanation:

It is given that,

\tan (b^\circ)=\dfrac{3}{4}

\cos (b^\circ)=\dfrac{4}{5}

If a figure is dilated, then the image is similar to the figure. It means the corresponding angles of figure and image are congruent.  

So, the value of sin(b°) after dilation is equal to the value of sin(b°) before dilation.

We know that,

\dfrac{\sin \theta}{\cos \theta}=\tan \theta

\dfrac{\sin (b^\circ)}{\cos (b^\circ)}=\tan (b^\circ)

\sin (b^\circ)=\tan (b^\circ)\times \cos (b^\circ)

\sin (b^\circ)=\dfrac{3}{4}\times \dfrac{4}{5}

\sin (b^\circ)=\dfrac{3}{5}

Therefore, \sin (b^\circ)=\dfrac{3}{5}.

5 0
4 years ago
For a data set of brain volumes ​(cm3​) and IQ scores of eight males, the linear correlation coefficient is found and the​ P-val
tatiyna

Answer:

The​ P-value indicates that the probability of a linear correlation coefficient that is at least as extreme is 0.793 which is high so there is not sufficient evidence to conclude that there is a linear correlation between brain volume and IQ score in males.

Step-by-step explanation:

We are given the following information in the question:

p-value = 0.793

Significance level = 0.05

H_{0}: \mu = \text{ The population correlation coefficient is not significantly different from 0}\\H_A: \mu = \text{ The population correlation coefficient is significantly different from 0}

Since p value is greater than the significance value so we fail to reject the null hypothesis and accept the null hypothesis.   We conclude that there is not a significant linear relationship between two variables.

Thus, we can write:

The​ P-value indicates that the probability of a linear correlation coefficient that is at least as extreme is 0.793 which is high so there is not sufficient evidence to conclude that there is a linear correlation between brain volume and IQ score in males.

7 0
3 years ago
Solve 247 × 82 using an area model<br><br><br><br><br>Can anyone help me pls​
VMariaS [17]

Answer:

Step-by-step explanation:

2 x 40 = 80

200 x 2 = 400

80 x 7 = 560

4 0
3 years ago
4. Simplify 6g(-3h - 4).
ozzi

Answer:

-18gh-24g

Step-by-step explanation:

7 0
3 years ago
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