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I need to write a self-reflection essay on a presentation for Oral Hygiene that I did, but I don't really understand what or how to start this

Use cross products to determine which of the following pairs of ratios cannot form a proportion? A-1/3 X 3/9 B-2/3X 4/9 ******** C- 2/3 X 4/6 D- 1/3 X 2/6 Am I correct?

The scale factor for two similar rectangles is 3. if the area of the smaller rectangle is 8 m2, what is the area of the larger rectangle? A- x=7,y=12 B- x=21,y=12 C- x=14,y=18 D- x=7,y=18****** I picked "d" am I correct?

Jonah needs to purchase 30 juice packs for his class. While shopping,Jonah discovers the following prices for comparable juice packs. Which offers the best unit price? A- 15 packs for $3.95****** B- 5 packs for $2.20 C- 20 packs for $6.20 D-10 packs for $...

thank you

The scale factor for two similar rectangles is 3. if the area of the smaller rectangle is 8 m2, what is the area of the larger rectangle? A- 24m2 B-192m2 C-72m2***** D-108m2 I put the wrong answers to the questions but theses are the right ones! I picked...