The answer is D. First, it is the segment addition postulate because the two segments make up the whole. Second, it's substitution because you are substituting EF + FG for FH.
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We can find this by doing 16/2
This is equal to 8
The answer is you need 8 teaspoons of vinegar for 16 tsp of mayonnaise
1) divide 26.32 by 8 = 3.29
2) 3.29 x 20= 65.80
3) he would spend 65.80 on 20 gallons of gas