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3 years ago

I will give brainly!!!!

Mathematics

2 answers:

Naya [18.7K]3 years ago

8 0

Answer:

The square root of 25 is 5

Step-by-step explanation:

Please mark me as Brainliest and follow me

Paha777 [63]3 years ago

5 0

Answer:

the square root of 25 is 5

Step-by-step explanation:

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Determine if each relation is a function if not explain why

bekas [8.4K]

Answer: a c d

Step-by-step explanation: they are functions because the line is intersecting points as well as being squared cubes and a is a absolute value function

8 0

1 year ago

Toxaphene is an insecticide that has been identified as a pollutant in the Great Lakes ecosystem. To investigate the effect of t

Likurg_2 [28]

Answer:

This data suggest that there is more variability in low-dose weight gains than in control weight gains.

Step-by-step explanation:

Let $\sigma_{1}^{2}$ be the variance for the population of weight gains for rats given a low dose, and $\sigma_{2}^{2}$ the variance for the population of weight gains for control rats whose diet did not include the insecticide.

We want to test $H_{0}: \sigma_{1}^{2} = \sigma_{2}^{2}$ vs $H_{1}: \sigma_{1}^{2} > \sigma_{2}^{2}$ . We have that the sample standard deviation for $n_{2} = 22$ female control rats was $s_{2} = 28$ g and for $n_{1} = 18$ female low-dose rats was $s_{1} = 51$ g. So, we have observed the value

$F = \frac{s_{1}^{2}}{s_{2}^{2}} = \frac{(51)^{2}}{(28)^{2}} = 3.3176$ which comes from a F distribution with $n_{1} - 1 = 18 - 1 = 17$ degrees of freedom (numerator) and $n_{2} - 1 = 22 - 1 = 21$ degrees of freedom (denominator).

As we want carry out a test of hypothesis at the significance level of 0.05, we should find the 95th quantile of the F distribution with 17 and 21 degrees of freedom, this value is 2.1389. The rejection region is given by {F > 2.1389}, because the observed value is 3.3176 > 2.1389, we reject the null hypothesis. So, this data suggest that there is more variability in low-dose weight gains than in control weight gains.

8 0

2 years ago

Need to find the equation for the line with the given properties. Express your answer using either the general form or the slope

Phoenix [80]

To answer this question we will use the following slope-point formula for the equation of a line:

$y-y_1=m(x-x_1)\text{.}$

Therefore, the equation of the line that has a slope of 1/3 and passes through the point (-3,3) is:

$y-3=\frac{1}{3}(x-(-3))\text{.}$

Simplifying the above equation we get:

$\begin{gathered} y-3=\frac{1}{3}(x+3), \\ y-3=\frac{1}{3}x+1. \end{gathered}$

Adding 3 to the above equation we get:

$\begin{gathered} y-3+3=\frac{1}{3}x+1+3, \\ y=\frac{1}{3}x+4. \end{gathered}$

Answer:

$y=\frac{1}{3}x+4.$

4 0

7 months ago

How do you find the percent change?

antoniya [11.8K]

Hello!!
To calculate the percentage increase: First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. If your answer is a negative number then this is a percentage decrease.
let me know if u have anymore questions!:)

7 0

2 years ago

Simplify 1/3 - 1/2 + 2/5

fenix001 [56]

Answer:

$\frac{1}{3} - \frac{1}{2} + \frac{2}{5}$