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3 years ago

Determine the type of triangle that has side lengths of 45, 45, and 90.

Mathematics

2 answers:

olganol [36]3 years ago

7 0

Answer:

Equilateral triangle

lubasha [3.4K]3 years ago

6 0

Equilateral triangle

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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

Solution:

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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3 years ago

Valerie earns $24 per hour. which expression can be used to show how much money she earns in 7 hours

Natalija [7]

Y = 24 x
y= 24(7)
y=168 hrs

5 0

3 years ago

David charges $17 plus $7.00 per hour to mow lawns. Ari charges $11 plus $7.75 per hour to mow lawns. In what situations is Ari'

iren2701 [21]

Answer:

Ari's is less than Davids

Ari=18.75

David=24.00

Step-by-step explanation:

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3 years ago

What is the answer to this question and help in full steps

klio [65]

Cos(x)= adjacent/hypotenuse
cos(18)=x/25 (cross multiply)
25*cos(18)=x
x= 23.78 cm <--- this is rounded to the nearest hundredth.

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3 years ago

F(x) =2x + 5 and g(x)=5, find(fg)(x)

irakobra [83]

Answer: C) 10x + 25

Step-by-step explanation:

f(x) = 2x + 5 , g(x) = 5

(fg)(x) = (2x + 5) * 5

= 10x + 25

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3 years ago