Answer:
A
Step-by-step explanation:
$16.50 original- $13.20 on sale
Y=0.5x+800
in this equation the x is the weeks so for every week that goes by you would multiply 0.5 times that number then add the 800 original cm to get your answer (y)
The general equation of a line is y = mx + b
m is given as 1/2, so we have:

Plugging in the given values of x and y, we get:
-2 = 0 + b
Therefore b = -2, and the answer is:
B or D so sorry these ones are confusing written like this.
Gave a lovely weekend.
The answer to what is the measure of ∠acb is 34.7