Graphing Two-Variable Linear Inequalities (MC)

A zoo charges [tex]\$24[/tex] for adult tickets and [tex]\$10[/tex] for child tickets. The average family spends at least [tex]\$44[/tex] to go to the zoo. These charges can be represented by the inequality [tex]24x + 10y \geq 44[/tex].

Which of the following is a viable solution in the context of this problem?

A. [tex](1, 1)[/tex]
B. [tex](8, 2.5)[/tex]
C. [tex](4, -2)[/tex]
D. [tex](4, 6)[/tex]



Answer :

Let's evaluate each given point to see if it satisfies the inequality [tex]\( 24x + 10y \geq 44 \)[/tex], where [tex]\( x \)[/tex] represents the number of adult tickets and [tex]\( y \)[/tex] represents the number of child tickets.

1. Point (1, 1):
- Substituting [tex]\( x = 1 \)[/tex] and [tex]\( y = 1 \)[/tex] into the inequality:
[tex]\[ 24(1) + 10(1) = 24 + 10 = 34 \][/tex]
- The result [tex]\( 34 \)[/tex] is less than [tex]\( 44 \)[/tex], so the point [tex]\((1, 1)\)[/tex] is not a viable solution.

2. Point (8, 2.5):
- Substituting [tex]\( x = 8 \)[/tex] and [tex]\( y = 2.5 \)[/tex] into the inequality:
[tex]\[ 24(8) + 10(2.5) = 192 + 25 = 217 \][/tex]
- The result [tex]\( 217 \)[/tex] is greater than [tex]\( 44 \)[/tex], so the point [tex]\((8, 2.5)\)[/tex] is a viable solution.

3. Point (4, -2):
- Substituting [tex]\( x = 4 \)[/tex] and [tex]\( y = -2 \)[/tex] into the inequality:
[tex]\[ 24(4) + 10(-2) = 96 - 20 = 76 \][/tex]
- The result [tex]\( 76 \)[/tex] is greater than [tex]\( 44 \)[/tex], so the point [tex]\((4, -2)\)[/tex] is a viable solution. (Note: While this mathematical solution is viable, a negative number of children's tickets is not practical in a real-world context.)

4. Point (4, 6):
- Substituting [tex]\( x = 4 \)[/tex] and [tex]\( y = 6 \)[/tex] into the inequality:
[tex]\[ 24(4) + 10(6) = 96 + 60 = 156 \][/tex]
- The result [tex]\( 156 \)[/tex] is greater than [tex]\( 44 \)[/tex], so the point [tex]\((4, 6)\)[/tex] is a viable solution.

Summary:
- The points [tex]\((8, 2.5)\)[/tex], [tex]\((4, -2)\)[/tex], and [tex]\((4, 6)\)[/tex] are viable solutions.
- The point [tex]\((1,1)\)[/tex] is not a viable solution.