The first one. Segment NO is proportional to segment QR, and angles M and P are congruent.
In similar triangles, their angles are congruent but their sides are only proportional. That is why the last three are not true.
Step 2 is wrong: 4x - x = 5x
X = -11 is the actual answer, pretty sure.
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Answer:
3/10 or 30%
Step-by-step explanation:
Add all of the marbles: 5+2+3=10
Then use a fraction to represent the three purple marbles: 3/10
That porportion is your answer
Length * Width
160 inches * 160 inches = 320 inches squared.