180 times 4/100= 7.20- Sales tax
180+7.20= $187.20 is the total cost
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Consider, please, this solution/explanation:
1. suppose, that number of cars is 'x', numbers of buses is 'y'.
2. according to the condition 'a total of 32', it means that x+y=32. This is the 1st equation.
3. according to the condition in one car are 3x persons, in one bus are 27y persons, and totaly 3x+27y=408 people. This is the 2d equation.
4. if to solve the system of two equations:

Answer: 13 - b., 19 - c.
Answer:
-7, -6, -4, -2, 0, 2, 5, 7, 8, 9
Step-by-step explanation: