To determine which of the given solutions is viable, we need to set up the equation based on the total amount Cindy won and how much she spends on robotics kits and chemistry sets.
Let:
- \( y \) = number of robotics kits (costing $10 each)
- \( x \) = number of chemistry sets (costing $8 each)
The total cost equation can be expressed as:
\[ 10y + 8x = 50 \]
We will test each option provided to see if it satisfies the equation:
-
(3, 2.6):
- \( y = 3 \), \( x = 2.6 \)
- Total cost: \( 10(3) + 8(2.6) = 30 + 20.8 = 50.8 \) (not viable)
-
(−5, 9):
- \( y = -5 \), \( x = 9 \)
- Total cost: \( 10(-5) + 8(9) = -50 + 72 = 22 \) (not viable)
-
(5, 1):
- \( y = 5 \), \( x = 1 \)
- Total cost: \( 10(5) + 8(1) = 50 + 8 = 58 \) (not viable)
-
(0, 5):
- \( y = 0 \), \( x = 5 \)
- Total cost: \( 10(0) + 8(5) = 0 + 40 = 40 \) (not viable; would be less than $50)
None of the given options correctly satisfy the total of $50 from the equation derived, indicating that none of them are viable solutions.
Thus, Cindy cannot purchase the number of robotics kits and chemistry sets as described by any of the given options while spending her entire $50.