the 20x(8+2) is just two times greater as its 200 instead of 100 which is the other answer
Y = 12x......y = 12(4).....y = 48.....so she pays $ 48 for the old brand when buying 4 boxes
y = 8x...y = 8(4)......y = 32...so she pays $ 32 for the brand she changed to, when buying 4 boxes
so the super saving brand would save her (48 - 32) = $ 16 per month
Answer:

Step-by-step explanation:

Break it down step by step.

Answer: an arithmetic sequence
Step-by-step explanation:
Angles on a straight line add up to 180°, so:
x + 60 = 180
x = 180 - 60
x = 120°