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IrinaVladis [17]
3 years ago
14

Circles with centers (2,1) and (8,9) have radii 1 and 9, respectively. The equation of a common external tangent to the circles

can be written in the form y=mx+b with m < 0. What is b?
Mathematics
1 answer:
Mnenie [13.5K]3 years ago
6 0
B=30/7 and 80/7

hope this helps<3

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James invested $300 in a bank account that earns simple interest. He earns $24 at the end of 12 months. James invests $500 at th
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Answer: $40

Step-by-step explanation:

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Since we know that both investments have the same interest rate, we can use the information from the first part of the problem to solve for the interest rate. Using algebra, we can rearrange the simple interest formula to solve for the interest rate:  r=I/pt. We know that our interest earned is $24 and our principal amount is $300. To make things easier, we'll also convert months to years, which is easy to do since we know that 12 months = 1 year. This gives us our value for the amount of time that passes. Now, all we have to do is plug in our values into the rearranged equation above.

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