Answer: Ratio of Parts
<u>Step-by-step explanation:</u>

The ratios are equal so the triangles are similar.
Answer:
2.14
Step-by-step explanation:
2.14x24=51.36
1. She could get 9 envelopes for 4 dollars each (or the other way around)
2. She could get 12 envelopes for 3 dollars each (or the other way around)
3. She could get 18 envelopes for 2 dollars each (or the other way around)
Answer:
20
Step-by-step explanation:
260/13=20
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(x-5)(x+2)=0
roots: x=5 and x= -2
see attached photo for steps