Best deal 1
quantity of flour price
3 pounds $5.25
5 pounds $9.75
7 pounds $12.60
10 pounds $14.20
12 pounds $18.24

a baker purchases flour each week from a wholesale warehouse. the chart shows the quantities and prices available this week. if the best deal last week for flour was $1.60 per pound. what is the difference between the unit price for last week's best deal and this week's best deal?

a)8 cents
b)15 cents
c)18 cents
d)20 cents

C) 18 cents

Step-by-step explanation:

Given,

This weeks deal -

Quantity of Flour      Price ($)         Price per pound ($)

3 pounds                    5.25                 (5.25/3) =  1.75

5 pounds                    9.75                 (9.75/3) =   1.95

7 pounds                    12.60                (12.60/3) = 1.80

10 pounds                  14.20                 (14.20/3) = 1.42

12 pounds                  18.24                 (18.24/3) = 1.52

The lowest price per pound is $1.42. Therefore, this is the current week's best deal.

The last week's best deal was = $`1.60/pound

The difference between the unit price for previous week's best deal and this week's best deal = $1.60 - $1.42 = $0.18

Therefore, 18 cents.

i assume you mean  3x^2 + 16y = 0

so y =  -3/16 x^2

The vertex is at the origin (0,0)  answer

x^2 = -16/3 y

compare with standard form x^2 = 4ay:-

the focus y coordinate of the  a =  -16/3  / 4

= -16/12 =  -4/3   so the focus is (0, -4/3) answer

and the directrix is y = 4/3  answer