(-17,8)
(3,-2)
y-y1=m(x-x1)
where a point is (x1,y1)
and slope=m
slope of 2 points
(x1,y1) and (x2,y2) is
(y2-y1)/(x2-x1)
(-17,8) and (3,-2)
(x,y)
slope=(-2-8)/(3-(-17))=-10/(3+17)=-10/20=-1/2
y-y1=-1/2(x-y2)
can be
y-8=-1/2(x+17) or
y+2=-1/2(x-3)
2nd option is the answer
Help you with what homework???
Ouuuuuuu i didnt have that but can somebody help with this because it seem hard.
<span>let x be number of bicycles
and y the number of</span> tricycles<span>
So
x + y = 25 equation 1
The number of wheels is
2x + 3y = 63 equation 2
</span>We can multiply the equation 1 by two and subtract from the second one...
2x + 3y = 63
-(2x + 2y = 50)
then
y = 13 trikes and
x = 12 bikes
Answer:
Circumference of the circle is ![131.88m](https://tex.z-dn.net/?f=131.88m)
Step-by-step explanation:
we have to find the circumference of the given circle.
Given:
Diameter=42 m
![\\diameter=2*radius\\42 =2*radius\\radius=42/2\\radius=21 m](https://tex.z-dn.net/?f=%5C%5Cdiameter%3D2%2Aradius%5C%5C42%20%3D2%2Aradius%5C%5Cradius%3D42%2F2%5C%5Cradius%3D21%20m)
Circumference of a circle= ![2\pi r](https://tex.z-dn.net/?f=2%5Cpi%20r)
![=2*\pi *21\\=2*3.14*21\\=42*3.14\\=131.88](https://tex.z-dn.net/?f=%3D2%2A%5Cpi%20%2A21%5C%5C%3D2%2A3.14%2A21%5C%5C%3D42%2A3.14%5C%5C%3D131.88)
So, the circumference of the circle is ![131.88m](https://tex.z-dn.net/?f=131.88m)