Question

7. Tess has 42 words of an essay typed and is typing about 1.3 words per second. Margo Tess has 122

words of an essay typed and is erasing about 1.2 words per second. In how many seconds will the
number of words in Tess's essay exceed the number of words in Margo's essay?

Answer 1

32 seconds

Explanation:

42 + 1.3x = 122 - 1.2x

42 + 2.5x = 122

2.5x = 80

x = 32

42 + 1.3(32) = 83.6

122 - 1.2(32) = 83.6

Inequality:

42 + 1.3x ≥ 122 - 1.2x