2 years ago

Please help! I will mark as brainliest. <3

1 answer:

6 0

Answer:

900

Step-by-step explanation:

set both options equal to each other so we know the intersection.

30000 + 20t = 21000 + 30t

now solve for t.

10t = 30000-21000

t = 90000/10

t = 900

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