Question 1 Unsaved

Which equation has 5 as the value of k?

Question 1 options:

2.4 (k-1.3) = 15.12

1.1k-1.8=7.3

1.4 (0.7k+2) = 2.1

1.8k+3.2=12.2

Question 1 Unsaved

Which equation has 5 as the value of k?

Question 1 options:

2.4 (k-1.3) = 15.12

1.1k-1.8=7.3

1.4 (0.7k+2) = 2.1

1.8k+3.2=12.2

The easiest way is to replace "k" with "5" for each of the options and solve to find out which results in a true statement.

2.4 (5 - 1.3) = 15.12 → 2.4 (3.7) = 15.12 → 8.88 = 15.12 FALSE

1.1 (5) - 1.8 = 7.3 → 5.5 - 1.8 = 7.3 → 3.7 = 7.3 FALSE

1.4 (.7 (5) + 2) = 2.1 → 1.4 (3.5 + 2) = 2.1 → 1.4 (5.5) = 2.1 → 7.7 = 7.3 FALSE

1.8 (5) + 3.2 = 12.2 → 9.0 + 3.2 = 12.2 → 12.2 = 12.2 TRUE!

Answer: 1.8k + 3.2 = 12.2