Math Test Form Assignment

Name:

What is 6×2+2×2

35
16
18
6

What is (21+13)÷(4+1)

6.8
-5.6
3.5
6

What is 1×9−4×6

-70
-30
-15
4

Jim owns 19 cows (x), and wants to buy 19 more cows (x).
He needs to buy more feeding troughs (y) for the cows, so he used the equation x ÷ 3 = y.
He concluded he needs 18 troughs.
Why is Jim wrong? Provide the correct answer (rounded), and explain