What substitution should be used to rewrite 6(x + 5)2 + 5(x + 5) – 4 = 0 as a quadratic equation?
u = (x + 5)
u = (x – 5)
u = (x + 5)2
u = (x – 5)2

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

so, converting firstly the mixed fractions to improper fractions and then "adding".

step-by-step explanation:

mean or average is 40.6

step-by-step explanation: