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3 years ago

Please answer as i dont i have time.

Mathematics

2 answers:

jolli1 [7]3 years ago

8 0

Total distance=2(8+2)=2(10)=20miles
Time=2h

$\\ \sf\longmapsto Speed=\dfrac{20}{2}=10mph$

Now the distance=10miles+10miles+10miles+10miles=40mi

Masteriza [31]3 years ago

5 0

Step-by-step explanation:

tot dist = 2•(8+2) = 20 miles

t = 2 h

...

dist = 20/2 × 4

dist = 10 × 4

dist = 40 miles

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Answer:

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Given, total no of slices=8.

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7 0

3 years ago

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Korvikt [17]

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3 years ago

Find the value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2

soldier1979 [14.2K]

The value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2 is -2

<u>Solution:</u>

Given that line is passing through point (-5, 2) and (3, r)

Slope of the line is $\frac{-1}{2}$

Need to determine value of r.

Slope of a line passing through point $\left(x_{1}, y_{1}\right) \text { and }\left(x_{2}, y_{2}\right)$ is given by following formula:

$\text { Slope } m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ --- eqn 1

$\text { In our case } x_{1}=-5, y_{1}=2, x_{2}=3, y_{2}=\mathrm{r} \text { and } m=-\frac{1}{2}$

On substituting the given value in (1) we get

$\begin{array}{l}{-\frac{1}{2}=\frac{r-2}{3-(-5)}} \\\\ {\text { Solving the above expression to get value of } r} \\\\ {=>-\frac{1}{2}=\frac{r-2}{3+5}} \\\\ {=>-8=\frac{r-2}{3+5}} \\\\ {=>-8=2(r-2)} \\\\ {=>-8=2 r-4} \\\\ {=>2 r=-8+4} \\\\ {=>2 r=-4} \\\\ {=>r=\frac{-4}{2}=-2}\end{array}$

Hence the value of "r" is -2

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4 years ago