Choose all of the equations that are equivalent to 8k = 20. A. 8k – 4 = 20 + 4 B. 8k ÷ 4 = 20 ÷ 4 C. 8k × 3 = 20 × 3 D. 8k + 10 = 20 + 10 E. 8k × 5 = 20 ÷ 5
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Given:
8k = 20
Determine the equation that is equivalent to the given:
Choices:
A. 8k – 4 = 20
8k = 20 + 4
8k = 24
Not equivalent
B. 8k ÷ 4 = 20 ÷ 4
2k = 5
Equivalent since it is proportional to the given.
C. 8k × 3 = 20 × 3
24k = 60
Equivalent since it is proportional to the given.
D. 8k + 10 = 20 + 10
18k = 30
Not equivalent since it is not proportional.
E. 8k × 5 = 20 ÷ 5
40k = 4
Not equivalent since different signs are used on both sides of the equation and it is not proportional.
Final answer:
B. 8k ÷ 4 = 20 ÷ 4
C. 8k × 3 = 20 × 3