Trinity's science instructor entered the 7th students in a STEM competition. There was an enrollment fee of $50 and an additiona

Question

3 years ago

10

Trinity's science instructor entered the 7th students in a STEM competition. There was an enrollment fee of $50 and an additiona

l fee of $12 for each packet of 10 tests. The total cost was $170. How many tests were purchased?
Which of the following equations best models the situation?
Question 1 options:

12x + 50 = 170

50x + 12 = 170

12x - 50 = 170

50x - 12 = 170

Mathematics

1 answer:

lina2011 [118] · Answer 1 · 2022-04-23T04:59:03+03:00

lina2011 [118]3 years ago

3 0

12x +50 = 170
-50 -50
12x=120
/12 /12
x=10

Ten packets were purchased