Answer:
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21x+1+14x+4=180
35x+5=180
35x=175
X=5
21(5)+1
105+1
Answer
Answer:
24.3
Step-by-step explanation:
18/20 = x/20 (similar triangles)
Answer:
This is a reflection about the x-axis.
Step-by-step explanation:
A reflection about the x-axis has the rule
[x,y]-> [x,-y].
Therefore
M[x,y] = [x,-y}
Let M=
|a b|
|c d|
Then the matrix multiplication gives
ax+by=x.............(1)
cx+dy=-y............(2)
Solving the previous equations (1) and (2) gives
a=1, b=0
c=0, d=-1
giving M as
|1 0|
|0 -1|
