Question

What value of n makes this equation true?

0.7n + 0.8n = 2.1

A. n = 0.60

B. n = 1.40

C. n = 3.15

D. n = 3.60

Answer 1

B). n = 1.40

Explanation:

0.7n + 0.8n = 2.1

(0.7n + 0.8n) = 2.1

1.5n = 2.1

/1.5 /1.5

n = 1.40

hope this helped!

Answer 2

0.7n+0.8n=2.1

1.5n=2.1

n=1.4

Therefore, the answer is B.