Can you answer the question please I really need help

Hannah starting playing video games as soon as she got home from school. She played video games for 20 minutes. Then, it took Ha

kap26 [50]

She got home from school at 2:45 pm

3 0

2 years ago

8 (40+7) = ( 8. ) + (8 7

prohojiy [21]

The first part is 8 x 40=320
8 x 7=56
320+56 and i am not sure what you have going on on the other half

8 0

3 years ago

Help me please ?!!!!

blondinia [14]

Answer:

The slope of the line is -1

Step-by-step explanation:

Slope of a Line

Suppose we know a given line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated as follows:

$\displaystyle m=\frac{y_2-y_1}{x_2-x_1}$

From the table in the image, we select the points (1,4) (3,2). The slope is:

$\displaystyle m=\frac{2-4}{3-1}=\frac{-2}{2}=-1$

Now select two other points like (5,0) (7,-2)

$\displaystyle m=\frac{-2-0}{7-5}=\frac{-2}{2}=-1$

Following the same procedure with any other pair of points, we'll get the very same result:

The slope of the line is -1

4 0

3 years ago

What is D and R? Please answer I need help.

Setler79 [48]

Answer:

31. D: {8, 4, 0, -4}; R: {2, -1}; yes

32. D: {-1, 2, 7}; R: {-4, -3, -2, 0}; no

33. D: {-4, -3, -1, 2, 3, 5}; R: {-3, -2, 0, 3, 5}; yes

34. D: (-∞, ∞); R: (-∞, 4]; yes

35. D: [0, 5]; R: [-2, 3]; no

Step-by-step explanation:

In this context, D means "domain" and R means "range." The domain of a function is the list of input values for which the function is defined. For ordered pairs, it is the first number of the pair. For an x-y table, it is the list of x-values. For a graph, it is the possible values of x.

A relation is a function only if there are no repeated values in the domain (2 or more outputs for the same input.)

The range of a function is the list of output values produced by the function. For ordered pairs, it is the second number of the pair. For an x-y table, it is the list of y-values. For a graph, it is the possible values of y.

__

31. D: {8, 4, 0, -4}

R: {2, -1}

Function: yes

Domain and range values don't need to be repeated. Often, they're listed in order from lowest to highest. Here, we have listed them in order of occurrence in the function definition.

__

32. D: {-1, 2, 7}

R: {-4, -3, -2, 0}

Function: no

__

33. D: {-4, -3, -1, 2, 3, 5}

R: {-3, -2, 0, 3, 5}

Function: yes

__

34. D: (-∞, ∞)

R: (-∞, 4]

Function: yes

__

35. D: [0, 5]

R: [-2, 3]

Function: no . . . . . . there are 2 y-values for most x-values

4 0

3 years ago

The average number of mosquitoes in a stagnant pond is 80 per square meter with a standard deviation of 12. If 36 square meters

svp [43]

Answer:

a) 18.4%

Step-by-step explanation:

Assuming a normal distribution, the z-score (z) for the probability of the average of the mosquitoes count being 'X' is given by:

$z(X)=\frac{X-\mu }{\frac{\sigma}{\sqrt{n}}}$

Where 'μ' is the distribution mean, 'σ' is the standard deviation and 'n' is the number of square meters chosen.

For X = 81.8 and n=36:

$z(X)=\frac{81.8 - 80}{\frac{12}{\sqrt{36}}}\\z(X)= 0.9$

A z-score of 0.9 is equivalent to the 81.59 th percentile in a normal distribution.

Therefore, the probability (P) that the average of those counts is more than 81.8 mosquitoes per square meter is:

$P= 100\% - 81.59\%\\P=18.41\%$

8 0

2 years ago