Answer:

Step-by-step explanation:

so



hope this helped! :)
Answer:
(72-40) = 8 x (9-5)
Step-by-step explanation:
GCF = 8
(72-40) = 8 x (9-5)
Let's say hmm let's use the figures in thousands, so
model A costs 90 + 4 per year, so... ok.. after "t" years, then the cost for model A is then 90 + 4*t, or
A = 90 + 4t.
now, model B is 70 + 10 per year, so,... after "t" years, model B is then
B = 70 + 10 * t, or
B = 70 + 10t.
if we were to assume A < B, namely the cost of A is less than B, what would the years be? namely, what's "t"?

after that period, then A becomes cheaper than B.
1. 42 cards
2. 3/5 of his cards