Express each rule with an equation. Use single letters to stand for the variables. Identify what each letter represents.
9. The number of hot dogs needed for a picnic is two for each students.
10. The cost of a taxi ride is $2.00 plus $1.10 per mile.
11. A cellphone family plan costs $49 per month plus $0.5 per text. Write an equation for the monthly bill b when t text are sent.
b = cost of monthly bill
1 = # of texts sent
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