Answer:
1. B, step 3
2. C, (7, -3)
Step-by-step explanation:
1. When distributing -3 in step 3, it's supposed to be -39, not 39.
2. If you solve the rest of the problem with -39 instead, you get (7, -3)
(-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
Answer:
Step-by-step explanation:
The easiest way to tell if a relation is a function is to look at the x coordinates. If none of them are the same in the set, then the relation is a function. If any of the x values are used more than once in the set, it is only a relation. This set uses -3 two times, so it is a relation.
Answer: 292 tiles
Step-by-step explanation:
To find the number of tiles needed , we need to know the area of the hexagonal tiles and also the area of the room.
<u>Area of hexagon</u>
The area of hexagon is given as :
Area =
Where a is the length of side.
Therefore:
A =
A = X 400
A = (400 x 3 x ) / 2
A =
A = 1039.23
Also to find the area of the room , we must first convert from m to cm
6.25 m = 6.25 x 100 cm
6.25m = 625 cm
4.85m = 485cm
Therefore: Area of the room = length x breadth
Area = 625 x 485
Area = 303125
Therefore , the number of tiles needed = area of the room / area of hexagon
Number of tiles = 303125/ 1039.23
N = 291.6823032
Therefore , the number of tiles needed ≈ 292