Ava, Riley, and Scarlett are at a park. Ava, who is hungry, buys 2 hot dogs, 1 fries, and 1 beverage for $7.90. Riley, who is thirsty, buys 1 hot dog, 2 fries, and 3 beverages for $11.70. Scarlett, who is vegan, buys 2 fries and 1 beverage for $6.25. How much does each item cost individually?
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Ava, Riley, and Scarlett are at a park. Ava, who is hungry, buys 2 hot dogs, 1 fries, and 1 beverage for $7.90. Riley, who is thirsty, buys 1 hot dog, 2 fries, and 3 beverages for $11.70. Scarlett, who is vegan, buys 2 fries and 1 beverage for $6.25. How much does each item cost individually?
Let the cost of 1 hotdog is= $x
The cost of 1 fries= $y
The cost of 1 beverage is = $z
According to the question:
2x+y+z=7.90
x+2y+3z=11.70
2y+z=6.25
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