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pogonyaev
3 years ago
5

If angle 10=30 degrees than angle 12 is how many degrees? Show your work

Mathematics
1 answer:
Alona [7]3 years ago
3 0
10= 30 degrees 30+90= 120
11= 60 degrees 180-120= 60
12= 60 degrees 180-120 = 60
13= 120 degrees 180-60= 120


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When using "mean" does it mean average of something if not please explain, I'm a bit confused.
lesya [120]
Mean the the total of all values, divided by the number of values
5 0
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-HELP ANSWER-
Doss [256]

Answer:

First point: (1,0)

Second Point: (2,1)

Third Point:  (3,2)

Fourth Point: (8,7)

Step-by-step explanation:

For the first two points, you have to plot the two pairs of coordinates that are given.  After this, you have to plug the x values into the equation to get the missing y values.

For example: The third point

X= 3

Y= X - 1

Y= 3 - 1

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So this means that the third coordinate is (3,2)


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4 years ago
6/8 yard and 3/4 are they the same length
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Yes, 6/8 reduces to 3/4 by dividing the numerator and denominator by 2.
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Comparing Functions: Mastery Test
Brums [2.3K]

Answer:

Table 3 has a greater y intercept

Step-by-step explanation:

See attachment (1) & (2) for graph and tables

First, we have to determine the y intercept of the graph

The y intercept of any graph or table is the corresponding value of a point where x = 0

In the attached graph.

x = 0 when y = 4

So:

y\ intercept = 4

Next, we determine the y intercept of each table.

Recall that: The y intercept of any graph or table is the corresponding value of a point where x = 0

For table 1:

y\ intercept = 3

For table 2:

y\ intercept = 2

For table 3:

y\ intercept = 5

By comparison, the y intercepts of tables (1) & (2) are less than the y intercept of the graph because: 3 and 2 are less than 4

However, the y intercept of table 3 is greater than the y intercept of the graph because 5 is greater than 4.

<em>Hence, table 3 has a greater y intercept</em>

7 0
3 years ago
I need to know how to do the whole thing and understand it.
patriot [66]

We are given the data on the number of candies handed by neighborhood A and neighborhood B.

Let us first find the mean and variance of each neighborhood.

Mean:

\bar{x}_A=\frac{\sum x}{N_1}=\frac{12}{6}=2\bar{x}_B=\frac{\sum x}{N_2}=\frac{20}{6}=3.33

Variance:

s_A^2=\frac{\sum x^2}{N_1}-\bar{x}_A^2=\frac{28}{6}-2^2=0.667s_B^2=\frac{\sum x^2}{N_2}-\bar{x}_B^2=\frac{80}{6}-3.33^2=2.244

A. Null hypothesis:

The null hypothesis is that there is no difference in the mean number of candies handed out by neighborhoods A and B.

H_0:\;\mu_A=\mu_B

Research hypothesis:

The research hypothesis is that the mean number of candies handed out by neighborhood A is more than neighborhood B.

H_a:\;\mu_A>\mu_B

Test statistic (t):

The test statistic of a two-sample t-test is given by

t=\frac{\bar{x}_A-\bar{x}_B}{s_p}

Where sp is the pooled standard deviation given by

\begin{gathered} s_p=\sqrt{\frac{N_1s_1^2+N_2s_2^2}{N_1+N_2-2}(\frac{N_1+N_2}{N_1\cdot N_2}}) \\ s_p=\sqrt{\frac{6\cdot0.667+6\cdot2.244}{6+6-2}(\frac{6+6}{6\cdot6})} \\ s_p=0.763 \end{gathered}t=\frac{2-3.33}{0.763}=-1.74

So, the test statistic is -1.74

Critical t:

Degree of freedom = N1 + N2 - 2 = 6+6-2 = 10

Level of significance = 0.05

The right-tailed critical value for α = 0.05 and df = 10 is found to be 1.81

Critical t = 1.81

We will reject the null hypothesis because the calculated t-value is less than the critical value.

Interpretation:

This means that we do not have enough evidence to conclude that neighborhood A gives out more candies than neighborhood B.

6 0
1 year ago
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