The answer is 1 : 1 : square root of 3
Length of one piece = 3 1/5 = 3.2 inches
Total length = 20 × 3.2 = 64 inches
That means 750 of the emails are not junk
bearing in mind that to get the x-intercept of any expression, we can simply set y = 0, and then solve for "x".
so let's check the slope of that line thus we can use its equation and set y = 0 then.
25 x² - 10 x = 0
5 x ( 5 x - 2 ) = 0
x = 0 and
5 x - 2 = 0
5 x = 2
x = 2: 5
x = 2/5
Answer: B ) x = 0 and x = 2/5