Mary's bill at a restaurant was $47.59. Mary wants to leave a 20% tip. About how much tip should Mary leave?

$9.52

Step-by-step explanation:

20% = 0.2

47.59(0.2) = 9.518

Rounded to hundredths:

9.52

$9.52

Step-by-step explanation:

20% of 47.59 is 9.52 so she should leave that much for a tip.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: