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3 years ago

Please help!!! The last one. Word answer

Mathematics

1 answer:

liberstina [14]3 years ago

4 0

Often, variability is most usefully expressed in the same units as the original data. That's what <em>standard deviation</em> (square root of variance) does. In situations where that is the case, the variance is useful only for getting to the value of standard deviation.

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Are these functions??!!

pashok25 [27]

Answer:

Going from left to right:

1.) Yes

2.) No

3.) Yes

4.) No

5.) No

6.) Yes

7.) No

8.) No

9.) Yes

10.) No

11.) Yes

12.) Yes

13.) No

14.) Yes

15.) Yes

16.) No

Step-by-step explanation:

Functions cannot have any repeating x-coordinates.

8 0

4 years ago

Read 2 more answers

Please help :) I have no clue & math isn’t my strong subject.

melisa1 [442]

Equation of a line that is perpendicular to given line is $y=\frac{-7}{4} x+\frac{7}{4}$ .

Equation of a line that is parallel to given line is $y=\frac{4}{7} x-\frac{69}{7}$ .

Solution:

Given line $y=\frac{4}{7} x+4$ .

Slope of this line, $m_1$ = $\frac{4}{7}$

$$\text{Slope of perpendicular line} = \frac{-1}{\text{Slope of the given line} }$

$$m_2=\frac{-1}{m_1}$

$$=\frac{-1}{\frac{4}{7} }$

Slope of perpendicular line, $m_2=\frac{-7}{4}$

Passes through the point (–7, 5). Here $x_1=-7, y_1=5$ .

Point-slope formula:

$y-y_1=m(x-x_1)$

$$y-(-7)=\frac{-7}{4} (x-5)$

$$y+7=\frac{-7}{4} x+\frac{35}{4}$

Subtract 7 from both sides, we get

$$y=\frac{-7}{4} x+\frac{7}{4}$

Equation of a line that is perpendicular to given line is $y=\frac{-7}{4} x+\frac{7}{4}$ .

To find the parallel line:

Slopes of parallel lines are equal.

$m_1=m_3$

$$m_3=\frac{4}{7}$

Passes through the point (–7, 5). Here $x_1=-7, y_1=5$ .

Point-slope formula:

$$y-(-7)=\frac{4}{7} (x-5)$

$$y+7=\frac{4}{7} x-\frac{20}{7}$

Subtract 7 from both sides,

$$y=\frac{4}{7} x-\frac{69}{7}$

Equation of a line that is parallel to given line is $y=\frac{4}{7} x-\frac{69}{7}$ .

7 0

3 years ago

Does 8 has more factors than 9

gayaneshka [121]

*have
and yes
8 factor
1,2,4,8
9 factor
1,3,9

5 0

3 years ago

Read 2 more answers

Help pleaseee need asap

horrorfan [7]

Answer:

x = 77/10

Step-by-step explanation:

Hope this helps!

5 0

3 years ago

The distance between two cities is 145 miles. A truck can cover this distance in 2.5 hours. A car is 1.5 times as fast as the tr

Sunny_sXe [5.5K]

Answer:

1 hour

Step-by-step explanation:

The speed ratio is ...

... truck : car = 1 : 1.5

Then the ratio of truck speed to the sum of their speeds is ...

... truck : combined = 1 : (1+1.5) = 1 : 2.5

Since time is inversely proportional to speed, the two vehicles will meet after 1/2.5 times the time the truck takes to cover the distance. That is ...

... (2.5 hours)/2.5 = 1 hour

_____

The truck speed is 145 mi/(2.5 h) = 58 mi/h.

The car speed is 1.5 × 58 mi/h = 87 mi/h.

Their combined speed is 58 + 87 = 145 . . . . mi/h.

So, they will cover the 145 mile distance in 1 hour.

3 0

3 years ago

Read 2 more answers