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3 years ago

(2,1)(3,1)(0,1)(5,1) A: Function B: Not a function

Mathematics

1 answer:

taurus [48]3 years ago

3 0

Answer:

This is a function because there are no repeating x values. Even though there are repeating y values, the x values are the ones that matter and they aren't repeating so it is a function. Also, the x values are the first ones.

Step-by-step explanation:

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Please please help I don’t understand

wlad13 [49]

The correct answers are:

A, C and D.

Explanation:

The height of a parallelogram must be perpendicular to, or make a right angle with, the base of the parallelogram.

In parallelogram A, it is a rectangle; this means by definition the side is at a right angle with the base and is therefore a height.

In parallelogram B, the short side is marked as the height. However, this side is not at a right angle with the base, so it cannot be a height.

In parallelogram C, the height is drawn perpendicular from the vertex of the top base to the (extended) bottom base; this is correct, since it is at a right angle.

The same is true of parallelogram D.

5 0

3 years ago

A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us

gregori [183]

Answer and Step-by-step explanation: The null and alternative hypothesis for this test are:

$H_{0}: s_{1}^{2} = s_{2}^{2}$

$H_{a}: s_{1}^{2} > s_{2}^{2}$

To test it, use F-test statistics and compare variances of each treatment.

Calculate F-value:

$F=\frac{s^{2}_{1}}{s^{2}_{2}}$

$F=\frac{1.26^{2}}{0.93^{2}}$

$F=\frac{1.5876}{0.8649}$

F = 1.8356

The critical value of F is given by a F-distribution table with:

degree of freedom (row): 20 - 1 = 19

degree of freedom (column): 20 - 1 = 19

And a significance level: α = 0.05

$F_{critical}$ = 2.2341

Comparing both values of F:

1.856 < 2.2341

i.e. F-value calculated is less than F-value of the table.

Therefore, failed to reject $H_{0}$ , meaning there is no sufficient data to support the claim that sham treatment have pain reductions which vary more than for those using magnets treatment.

4 0

3 years ago

A theater can seat 725 people. The number of rows is 4 less than the number of seats in each row. How many rows of seats are the

OverLord2011 [107]

725 is equal to (number of rows)*(number of seats per row)
r = s-4
725 = (s-4)s
s^2-4s-725 = 0
Factoring: (s-29)(s+25) = 0
Thus there are 29 seats per row, and 25 rows.

5 0

3 years ago

Whats the answerhsbxjbfbdjsjbdbdbdnndndndb

Ierofanga [76]

Answer:

x intercept is $(-\frac{5}{3} , 0)$