Well to be honest we can not tell the number of salads sold that day as we do not know the number of drinks sold that day or how much they costed in total or something. Assuming that the question was the maximum number of salads sold that day.
So the maximum number of salads that were sold were 125. Because 125 * 6.5 = 812.5 and the rest of money would have been from drinks.
Let X = Marinas speed in MPH
Let T = Time
T=288/X
312=(X+6)T
312=(X+6)(288/X)
312=288X/X+1728/X
312=288+1728/X
312-288=1728/X
24=1728/X
24X=1728
X=1728/24
X=72 MPH FOR MARINA
72+6=78 MPH FOR JAMIE
-18 because when you solve -2x-8=8 you get that x=-8 (plus 8 on both sides, then divide by -2 to isolate x) and then if you plug -8 in with 3, you get -24 then add the 6 which is -18.
Answer:
9x+8 and 3x+5.
Explanation:
Let the first polynomial = 9x + 8
Let the second polynomial be a+b

Similarly:

Thus, the second polynomial = 3x+5
Therefore, the two polynomials whose difference is 6x+3 are 9x+8 and 3x+5.
She's rounding down. Thinking you use the number from the hundred place. You round using the tens place. It's over 50 so u go off the 75 in this case ending up with 1,300