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frez [133]
3 years ago
13

Plz help!

Mathematics
2 answers:
Virty [35]3 years ago
6 0
Dy/dx=25, 35, 45, 55

d2y/dx2=10,10,10  (this constant just proves that it is a quadratic relation)

Now we can set up a system of equations for ax^2+bx+c

16a+4b+c=80, 9a+3b+c=45, 4a+2b+c=20  getting differences

7a+b=35, 5a+b=25  and again

2a=10, a=5, making 7a+b=35 become:

7(5)+b-35, b=0, making 4a+2b+c=20 become:

4(5)+2(0)+c=20, c=0 so

y=5x^2

So the constant of variation for this quadratic is 5.
Elan Coil [88]3 years ago
6 0
The correct answer to the problem is A or 5
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4 0
3 years ago
You estimate that there are 45 marbles in a jar. The actual amount is 82 marbles. Find the percent error. Round to the nearest t
Nataly_w [17]

Answer:

45.1

Step-by-step explanation:

The original amount is 82

But the wrong amount is 45

So we will have to calculate the percentage for the error

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37

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So the final answer is 45.1%

6 0
3 years ago
Gina Chuez has considered starting her own custom greeting card business. With an initial start up cost of $1500, she figures it
nordsb [41]
1500 + 0.45x < 1.70x
1500 < 1.70x - 0.45x
1500 < 1.25x
1500/1.25 < x
1200 < x.....so she would have to sell 1201 cards to make a profit

8 0
3 years ago
Read 2 more answers
Please answer this!!
Reika [66]
The second one is correct
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3 years ago
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