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photoshop1234 [79]
3 years ago
6

Anyone ?Math hw...........

Mathematics
1 answer:
Dovator [93]3 years ago
7 0
Both of these are linear functions:  
Distance A is d=2.5h  and is proportional to time because the distance is just 2.5 times however many hours you have traveled.
Distance B is d= 2(h-1) + 4.  This is not proportional to time but it is a linear function.
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When Barbara started her trip, the odometer read 13,487.8. When she ended the trip, it read
solniwko [45]
Who was the 1 president
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Find decimal notation.<br> 0.8​%
ipn [44]

To convert a percent to a decimal, divide the percent by 100.

0.8/100 = 0.008 <<<<<< answer.

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Select the number line that represents all solutions of e&gt;-0.5. (Answer FAST!!!)
Pie
Well the answer couldn’t be C because the arrow has to go to the right not left because for the > in the equation

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Answer and Step-by-step explanation:

The answer is that <u>A'C' will be 1.5 times longer than AC.</u>

<u></u>

This is because you are dilating the figure by a scale of 1.5.

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These roots of the polynomial equation x^4-4x^3-2x^2+12x+9=0 are 3,-1,-1. Explain why the fourth root must be a real number. Fin
Alex787 [66]

Roots with imaginary parts always occur in conjugate pairs. Three of the four roots are known and they are all real, which means the fourth root must also be real.

Because we know 3 and -1 (multiplicity 2) are both roots, the last root r is such that we can write

x^4-4x^3-2x^2+12x+9=(x-3)(x+1)^2(x-r)

There are a few ways we can go about finding r, but the easiest way would be to consider only the constant term in the expansion of the right hand side. We don't have to actually compute the expansion, because we know by properties of multiplication that the constant term will be (-3)(1)(1)(-r)=3r.

Meanwhile, on the left hand side, we see the constant term is supposed to be 9, which means we have

3r=9\implies r=3

so the missing root is 3.

Other things we could have tried that spring to mind:

- three rounds of division, dividing the quartic polynomial by (x-3), then by (x+1) twice, and noting that the remainder upon each division should be 0

- rational root theorem

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