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pantera1 [17]
3 years ago
13

Please help me!!!!!!! :)

Mathematics
1 answer:
Lilit [14]3 years ago
3 0
Hello there!

The answer is C.

I will explain to you how I came to this answer.

•First of all, I counted the turning points. There are two, so that means this polynomial function has THREE roots. (# of turning points+1=number of roots.)

•Next, look to see how many times the function crosses the x-axis. This is the number of REAL solutions. In this case, there is one point at which the f(x) is crossing the x-axis so there is one real solution.

•Since there is one real solution there has to be 2 imaginary roots. (Total # of solutions-real solutions=imaginary solutions)

NOTE: the turning points are where the increasing intervals change to decreasing and the decreasing change to increasing. The first derivative at these points is 0.

I hope this helps!
Best wishes~
-HuronGirl
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netineya [11]

Answer:

y=200-25x

Step-by-step explanation:

According to the problem, the initial condition is $200. If he owed $100 after 4 weeks, that means he paid $25 per week, so that would be the constant ratio. Therefore, the expression would be:

y=200-25x

Where y represents the amount owed, and x represents weeks.

So, in the 4 week, that is, x=4 he owed:

y=200-25(4)=200-100=100

As you can observe, the relation we found first perfectly to the problem. So, the final expression that model this problem is

y=200-25x

8 0
3 years ago
HELP ASAP!!!!!!!!!!!!!
OLEGan [10]

Answer:

∠ABC=90°

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use the fact that the sum of angles in a Δ is 180°

∠ABC= 180-20-70= 90

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ruslelena [56]

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Step-by-step explanation:

3 0
2 years ago
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3 years ago
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