All categories

3 years ago

Plz help me well mark brainliest if you are correct!!...

Mathematics

2 answers:

daser333 [38]3 years ago

8 0

The answer is A I hope this helps

pav-90 [236]3 years ago

6 0

Reflecting over the y axis means the x would change (flip from either positive to negative) so therefore the answer is A.

You might be interested in

X^4-6x^2+8(Type 2 of quadratic equation)

Alex Ar [27]

Step-by-step explanation:

x⁴ - 6x² + 8

= (x² - 4)(x² - 2)

= (x + 2)(x - 2)(x² - 2).

5 0

3 years ago

In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsibl

Anton [14]

Answer:

We do not reject the Null Hypothesis

Step-by-step explanation:

From the question we are told that:

Sample size $n=23$

Population mean $\mu=9.02cm^3$

Sample mean $\=x=8.16$

Standard deviation $\sigma=0.7cm^3$

Significance level $\alpha =0.01$

Generally the Null and and alternative Hypothesis are as follows

$H_0:\mu=9.02cm^3$

$H_a:\mu$

Therefore t critical Value is

$t\ critical\ Value=(\alpha,df)$

$t\ critical\ Value=(0.01,22)$

Where

$df=n-1\\\\df=23-1=>22$

Therefore

From t Table

$t value=-2.8$

Generally the equation for Z Critical is mathematically given by

$t=\frac{\=x-\mu}{\frac{\sigma}{\sqrt{n} } }$

$t=\frac{8.16-9.02}{\frac{0.7}{\sqrt{23} } }$

$t=-5.89$

Therefore

Since the t test statistics is greater than the Critical value

Hence,we do not reject the Null Hypothesis

4 0

3 years ago

Point Y (-1,-3) is rotated 180° about the origin. What are the coordinates of its image, point Y prime ?

fgiga [73]

Refer to the figure shown below.

When the point Y (-1,-3) is rotated 180 about O, it sweeps a semicircular arc to the point Y' (1,3).
The radius of the semicircle is
$r = \sqrt{1^{2} + 3^{2}} = \sqrt{10} \\ or \\ r = \sqrt{(-1)^{2} + (-3)^{2} } = \sqrt{10}$

Answer: 3. Y' (1,3)