SAT question 628300a9 (Linear Equations In One Variable)

Question

A science teacher is preparing the 5 stations of a science laboratory. Each station will have either Experiment A materials or Experiment B materials, but not both. Experiment A requires 6 teaspoons of salt, and Experiment B requires 4 teaspoons of salt. If x is the number of stations that will be set up for Experiment A and the remaining stations will be set up for Experiment B, which of the following expressions represents the total number of teaspoons of salt required?

College Board · Accepted Answer

The correct answer is C. Choice C is correct. It is given that x represents the number of stations that will be set up for Experiment A and that there will be 5 stations total, so it follows that 5 - x is the number of stations that will be set up for Experiment B. It is also given that Experiment A requires 6 teaspoons of salt and that Experiment B requires 4 teaspoons of salt, so the total number of teaspoons of salt required is 6x + 4(5 - x) , which simplifies to 2x + 20 .

CookSAT · Answer

Note: Use 5-x for the Experiment B stations, so the total simplifies to 2x+20.

Explanation

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Why the other choices are wrong

SAT Question 628300a9: Linear Equations In One Variable answer and explanation with Desmos solution

Explanation

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Why the other choices are wrong