-7a^2 because 3a-3a=0, the second set of terms can be simplified as -7a^2
3) For Zach, if his heart beats 15 times in 10 seconds, his heart beats 1.5 times in 1 second. Multiply this by 25 to get the number of times his heart will beat in 25 seconds → 1.5 * 25 = 27.5 times per 25 seconds. 1.5 * 60 = 90 times per minute. 1.5 * 120 = 180 times per two minutes. Do the same for your heart beats. 14 beats per 10 seconds is 1.4 beats per second. 1.4 * 25 = 35 times per 25 seconds. 1.4 * 60 = 84 times a minute. 1.4 * 120 = 168 times per two minutes.
4) Zach's equation would be H = 1.5n and yours would be H = 1.4n
5) Your heat beats just a little bit slower than Zachs. Everyone is different and there are many different things that can affect heart rate. Maybe he walked a little more than you did or maybe he was stressing about something which made his heart beat a little faster.
I hope this helps you!
Answer:
The graph of the function is attached in the figure a.
Step-by-step explanation:
Considering the expression

As we have to determine the graph of the function
- Using 3.14 for pi
The graph of the function is attached in the figure a.
Please check the attached figure a to visualize the graph.
Hope if helps.
Keywords: graph, sin function
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Step-by-step explanation:
The answer here is option C.