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omeli [17]
2 years ago
13

PLEASE ANSWER ME ASAPPPPPP​

Mathematics
1 answer:
velikii [3]2 years ago
8 0

Answer:

z=70* and y=140*

Step-by-step explanation:

u have to count it

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2 complementary angles are in the ratio 7:8.find the angles
slavikrds [6]
Complementary angles add up to 90 degrees
7:8....added = 15

7/15 * 90 = 630/15 = 42 <== one angle is 42 degrees
8/15 * 90 = 720/15 = 48 <== other angle is 48 degrees
3 0
3 years ago
For which method of data collection is it most important to select a representative sample so that the information may be genera
dalvyx [7]

ANSWER:

INFERENTIAL STATISTICS

STEP-STEP-BY EXPLANATION:

Inferential statistics are mathematical tools for estimating how likely it is that a statistical result based on data from a random sample is representative of the population from which the sample is assumed to have been selected.

It can make inferences from data to more general conditions like

* estimate the degree of confidence that can be placed in generalizations from a sample to the population from which the sample was drawn. (generalize your sample to a larger population)

5 0
3 years ago
Fill in the blanks. Then, choose the property of addition you used.
liubo4ka [24]

Answer:

_<u>7</u> + 3 = 3 + 7 : commutative property,[if something is added or subtracted]

0 +<u>5</u> _ = 5 is it: identity property.[if 0 is added or subtracted]

2 + (6 + 8) =(2 + 6)+ _<u>8</u> associated property

[if added or multiplied]

8 0
2 years ago
Please help 10 Points​
QveST [7]

Answer:

c

Step-by-step explanation:

8 0
3 years ago
Use the following table for questions 11-13.A baseball manager believes a linear relationship exists between the number of Home
slamgirl [31]

The regression equation of Y on X is given by the following formula:

Y-\bar{Y}=b_{yx}(X-\bar{X})

Where byx is given by the formula:

b_{yx}=\frac{N\sum^{}_{}XY-\sum^{}_{}X\sum^{}_{}Y}{N\sum^{}_{}X^2-(\sum^{}_{}X)^2}

Where N is the number of values (N=8). We need to find the sum of X values, the sum of Y values, the average of X, the average of Y, the sum of X*Y and the sum of X^2.

The table of values is:

The values we need to know are on the following table:

By replacing the known values in the formula we obtain:

\begin{gathered} b_{yx}=\frac{8\cdot26125-167\cdot995}{8\cdot4649-(167)^2} \\ b_{yx}=\frac{209000-166165}{37192-27889} \\ b_{yx}=\frac{42835}{9303} \\ b_{yx}=4.6 \end{gathered}

Now, the average of X and Y is the sum divided by N, then:

\begin{gathered} \bar{X}=\frac{167}{8}=20.87 \\ \bar{Y}=\frac{995}{8}=124.37 \end{gathered}

Replace these values in the formula and find the regression equation as follows:

\begin{gathered} Y-124.37=4.6(X-20.87) \\ Y-124.37=4.6X-4.6\cdot20.87 \\ Y=4.6X-96.11+124.37 \\ Y=4.6X+28.26 \end{gathered}

The answer is a) y=4.6x+28.26

7 0
1 year ago
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