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lys-0071 [83]
3 years ago
6

How many zeros does the function ????(x) = 3x^2 + 6x + 2 have? Explain how you know.

Mathematics
1 answer:
maxonik [38]3 years ago
6 0

Answer:

The function has 2 zeros:

x = -1 - \frac{1}{\sqrt{3}}\\x = -1 + \frac{1}{\sqrt{3}}

Step-by-step explanation:

When you have a polynomial function, you can identify the grade of the function (the grade is the maximum potency) and this is the number of zeros that the function will have. In this case, you have a second-grade polynomial function that has 2 zeros.

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A new phone costs $230 and the sales tax rate is 7%. What is the total cost of the camera after tax?
rosijanka [135]

That's a question about percentage.

One way to represent percentage is using decimal number. In this way, 1 is equivalent to 100% and the other less percentages using numbers between 0 and 1.

Examples:

  • 90% is equivalent to 0,90.
  • 5% is equivalent to 0.05. It's not 0.5 because 0.5 is equivalent to 50%.
  • 13.17% is equivalent to 0.1317.
  • 245% is equivalent to 2.45.

If we want to know the percentage of a number, we should multiplacate the number by the porcentage in the decimal number form.

Examples:

  • 55.90% of 200 is equal to: 200 \times 0.5590 = 111.8
  • 360% of 88 is equal to: 88\times 3.6 = 316.8

In our problem, we have a phone with a increase of 7%. To solve that, it's important to perceive that $230 is equal to 100% and with a increase of 7%, we will pay 107%.

107% in the decimal number form is 1.07. With that information, we should multiplicate 1.07 by the original value and we will find the answer.

We know that 230\times 1.07 = 246.1, therefore, the total cost of the phone after tax is $246.1.

I hope I've helped. :D

Enjoy your studies. \o/

4 0
3 years ago
How can you undo the addition of 7 on the left side of this equation? 6x + 7 = 19
BaLLatris [955]
6x - 7 = 19 
<span>6x = 19 + 7 </span>
<span>6x = 26 (divide both sides by 6 to get x) </span>
<span>6x/6 = 26/6 </span>
<span>x = 4.33333333333 </span>
8 0
3 years ago
SOMEONE HELP ME I GO CLASS IN 10 MINS!!
QveST [7]

Answer:

i think its mq

Step-by-step explanation:

3 0
3 years ago
Write 3.25 x 10^4 as an ordinary number.
MArishka [77]

Answer:

see below

Step-by-step explanation:

i'm guessing u must be from UK.... in the US "standard form" is known as "Scientific Notation"

Write 3.25 x 10^4 as an ordinary number: 32 500

Write 6.04 x 10^-3 as an ordinary number:  0.00604

Write 2 400 000 in standard form  : 2.4 x 10^6

Write 0.00147 in standard form: 1.47 X 10^-3

6 0
3 years ago
Read 2 more answers
Marina Guzmon’s bank granted her a single-payment loan of $3,250 to pay a repair bill. She agreed to repay the loan in 31 days a
iren [92.7K]
So basically he is paying 11.75% of the 3250 dollars in interest. So it’s 3250+(11.75% of 3250)

3 0
3 years ago
Read 2 more answers
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