Identify the number as real, complex, pure imaginary, or nonreal complex. (More than one of these descriptions may apply.) -9i

What is the length of the hypotenuse of triangle STU?

dolphi86 [110]

Answer:

C) 15

Step-by-step explanation:

This is following the 30-60-90 triangle ratio which goes x (leg) ,x sqrt 3 (leg), 2x (hypotenuse).

So multiply 7 1/2 by 2 to get 15

5 0

3 years ago

You provide a dog-walking service, and you report to the owners on the amount of exercise their dogs get on the walks. You walke

Eva8 [605]

the answer would be E because if you round answer E to 3mph and divide by 2 you get 1.5 and a hour is 60 minutes divide that by 2 and you get 30 minutes however you walked slightly slower so it would take 5 minutes longer.

7 0

3 years ago

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TIS IS TIMEDDD PLS ANSWER WILL GIVE BRAINLISTTTTT......

DedPeter [7]

Answer: well, just multiply x and y by the scale factor

Step-by-step explanation:A square with a perimeter of 20 units is graphed on a coordinate grid. The square is dilated by a scale factor

of 0.4 with the origin as the center of dilation.

If (x, y) represents the location of any point on the original square, which ordered pair represents the

coordinates of the corresponding point on the resulting square.

GIVE ME DA BRAINS

3 0

3 years ago

A zoologist is studying four very closely related feline species. She wishes to compare their gestation periods. An observationa

diamong [38]

Answer:

$p_v= 0.01$

Since the significance level is 0.05 we see that $pv$ so we have enough evidence to reject the null hypothesis. And the best conclusion for this case would be:

b. at least some, but not all, of the gestation periods across all four species are the same

Because is only to identify if AT LEAST one mean is different, NOT to conclude that the all the means are different.

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

Solution to the problem

The hypothesis for this case are:

Null hypothesis: $\mu_{A}=\mu_{B}=\mu_{C}= \mu_D$

Alternative hypothesis: Not all the means are equal $\mu_{i}\neq \mu_{j}, i,j=A,B,C,D$

In order to find the mean square between treatments (MSTR), we need to find first the sum of squares and the degrees of freedom.

If we assume that we have $p=4$ groups and on each group from $j=1,\dots,p$ we have $n_j$ individuals on each group we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2$

$SS_{between}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2$

$SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2$

And we have this property

$SST=SS_{between}+SS_{within}$

And in order to test this hypothesis we need to ue an F statistic and for this case the p value calculated is

$p_v= 0.01$

Since the significance level is 0.05 we see that $pv$ so we have enough evidence to reject the null hypothesis. And the best conclusion for this case would be:

b. at least some, but not all, of the gestation periods across all four species are the same

Because is only to identify if AT LEAST one mean is different NOT to conclude that the all the means are different.

8 0

4 years ago

PLEASE HELP 50 POINT AND BRAINLIEST

shepuryov [24]

Hello!

You can't use the product of powers rule because the numbers do not have exponents

If they did have exponents you still won't be able to use it because the bases have to be the same

Hope this helps!

4 0

3 years ago

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