High School

Phineas and Ferb are preparing to conduct experiments at Dataknee Incorporated. Phineas bought 4 beakers and 3 goggles for $33. Ferb bought 6 beakers and 2 goggles for $32. How much did each beaker and each goggle cost?

Answer :

Answer:

Beaker: $3, Goggles: $7

Step-by-step explanation:

Final answer:

This system of equations problem can be resolved with elimination or substitution. It is determined from the calculations that the cost of a beaker (X) is $3, and the cost of a goggle (Y) is $7.

Explanation:

This question is essentially asking you to solve a system of linear equations, where the cost of a beaker is one variable and the cost of a goggle is another variable. From the problem, we can formulate two equations.
Let X be the cost of a beaker and Y be the cost of a goggle. Thus, from Phineas, we get the equation: 4X + 3Y = $33. From Ferb, we get the equation: 6X + 2Y = $32. Now, we can solve this system by either substitution or elimination.
For this problem, let's use elimination. We will multiply the first equation by 2 and the second one by 3 to make the Y coefficients equal, then we can subtract one equation from the other.
We get: 8X + 6Y = $66, and 18X + 6Y = $96. Subtracting the first from the second, we get: 18X - 8X = $96 - $66, or 10X = $30, thus X = $3 (cost of a beaker).
We then substitute X = $3 in either of the two initial equations to find Y. Substituting in the first one, we get: $12 + 3Y = $33, or 3Y = $21, thus Y = $7 (cost of a goggle).

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