Answer:
Step-by-step explanation:
A.
Answer:
$3.30
Step-by-step explanation:
15 pencils * .22 cents. = 3 dollars and 30 cents !
Function 1
rate of change = (80-100)/(2-1) = -20
y = -20x + 120
function 2
y = -18x + 120
rate of change = -18
answer
function 2 shows a greater rate of change
Answer:

Step-by-step explanation:
Gradient



Equation of a line

- Sub one set of points into equation

Answer:
n < 20
Step-by-step explanation:
2n – 1 < 39
Add 1 to each side
2n – 1+1 < 39+1
2n < 40
Divide each side by 2
2n/2 < 40/2
n < 20