18. MODELING WITH MATHEMATICS The function y = 3.5x + 2.8 represents the cost y (in dollars)
of a taxi ride of x miles.
a. Identify the independent and dependent variables.
b. You have enough money to travel at most
20 miles in the taxi. Find the domain and
range
of the function.

Tracy solved the following problem. which of the statements is true? 9 ÷ 3 + 6 × 2 3 + 6 × 2 9 × 2 18 her answer is correct. her answer is incorrect. she should have multiplied before dividing. her answer is incorrect. she should have multiplied before adding. her answer is incorrect. she should have added before dividing.

Standard deviation of 19,29,21,22,23

Solve x+3y=6 and 4x-6y=6 by elimination . show work !