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Mademuasel [1]
3 years ago
7

I REALLY NEED TO PASS THIS LESSON PLZZZZ HELPPPP!!!!!

Mathematics
1 answer:
galben [10]3 years ago
6 0

Since she has "no more than $40 to spend" we know that the the symbol must be "less than or equal to" \leq.  Now we can eliminate the first and second choices because they are "greater than or equal to".


Next, we can figure out how to model this situation.  There is a flat $5 fee and each song is $2.  We can model this with 2s+5 ($2 per son plus $5).  


The answer is 2s+5\leq 40


Hope this helps!

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Answer:

12565.11 teeth approximately cut cross the cutting surface per seconds.

Step-by-step explanation:

Since the diameter is 10inches, the circumference of the arm saw is 10π (circumference is πd where d is diameter).

The number of teeth on the cutting blade can be gotten by multiplying the diameter by 12 since we have 12 teeth per inch on the arm saw

Number of teeth on saw = 12 x 10π = 120π.

To get the number of teeth that cross the cutting surface in 2000rpm we multiple it by the total number of teeth in just one rpm.

So we have 2000 x 120π. But since we are asked to find it in revolution per seconds then 2000r/m = 2000r/60s ≈ 33.33

Therefore, we have

33.33 x 120π ≈ 12565.11 teeth

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