Take the number of pen per box and multiply by the number of boxes giving you the total number of pens bought

Joel would have to go at least 10 times per month to make the 50 dollars per month the cheapest one.
Answer:
y-int. is -4 (red)
Step-by-step explanation:
Answer:
100⁰
because this is a quadrilateral inscribed in the circle
=> x + 80 = 180
<=> x = 180 - 80 = 100⁰