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Yakvenalex [24]
3 years ago
6

Solve 3x2 – 18x + 5 = 47 for x.

Mathematics
2 answers:
velikii [3]3 years ago
5 0

Answer:

x = 3 +√23 and x = 3 - √23

Step-by-step explanation:

The given equation 3x^2 -18x +5 = 47

This can be written as 3x^2 -18x + 5 - 47 =0

3x^2 -18x - 42 = 0

Here we have to use the quadratic formula.

x = \frac{-b +/- \sqrt{b^2 - 4ac} }{2a}

From the given equation, a = 3, b = -18 and c = -42

Plug in these values in the above formula, we get

x = \frac{-(-18) +/- \sqrt{(-18)^2 - 4.3.(-42)} }{2.3}

x = \frac{18 +/- \sqrt{828} }{6}

Simplifying the above expression, we get

x = 3 +√23 and x = 3 - √23

Hope this will helpful.

Thank you.

Ivenika [448]3 years ago
5 0

Answer:

x = 3 (+-)√23

ANSWER A

Step-by-step explanation:

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Solve 4x - c= k for x.
lapo4ka [179]

<em>Answer:</em>

<em>x = (k + c)/4</em>

<em>Step-by-step explanation:</em>

<em>4x - c = k</em>

<em>4x = k + c</em>

<em>x = (k + c)/4</em>

7 0
2 years ago
Read 2 more answers
Which recursive formula can be used to generate the sequence shown, where f(1) = 5 and n &gt; 1?
saveliy_v [14]

You can try them out and see which one works.

a: f(2) = f(1) +6 = 5+6 = 11 . . . . . . not this one

b: f(1) = f(2) -6 = -1-6 = -7 . . . . . . not this one (5 ≠ -7)

c: f(2) = f(1) - 6 = 5 - 6 = -1 . . . . . this gives the right f(2)

d: f(2 = -6(f(1) = -6(5) = -30 . . . . not this one

_____

The appropriate choice is ...

... f(n +1) = f(n) - 6

— — — — — 

You can also recognize that the next term is 6 less than the current one, so f(n+1) = f(n) - 6, which corresponds to the 3rd selection.

7 0
2 years ago
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Find the y-intercept of f(x) = 3x^2 + 6x
Step2247 [10]

Answ3r:

81x^2

Step-by-step explanation

I think

4 0
3 years ago
Read 2 more answers
Please help me
nikklg [1K]

Answer:

2. $1,100 in clothing sales gives Rachel a $260 paycheck

3 $.2,200 in clothing sales gives Rachel a $370 paycheck

5. $10,800 in clothing sales gives Rachel a 1,230 paycheck

Step-by-step explanation:

Here is the complete question :

Rachel works for a clothing store. She is $150 paid every week plus a 10% commission on any clothes that she sells. Which of the following is true in regards to Rachel's weekly paycheck? Chose three correct answers.

1. $100 in clothing sales gives Rachel a $250 paycheck

2. $1,100 in clothing sales gives Rachel a $260 paycheck

3 $.2,200 in clothing sales gives Rachel a $370 paycheck

4. $ 4,200 in clothing sales gives Rachel a $420 paycheck

5. $10,800 in clothing sales gives Rachel a 1,230 paycheck

6. $ 16,000 in clothing sales gives Rachel a 1,450 paycheck

The equation representing Rachel's paycheck = amount she earns every month + commission

If she makes  $100 in clothing sales, her paycheck = $150 + (0.1 x 100) = $160

If she makes  $1100 in clothing sales, her paycheck = $150 + (0.1 x 1100) = $260

If she makes  $2200 in clothing sales, her paycheck = $150 + (0.1 x 2200) = $370

If she makes  $4200 in clothing sales, her paycheck = $150 + (0.1 x 4200) = $570

If she makes  $10800 in clothing sales, her paycheck = $150 + (0.1 x 10800) = $1230

If she makes  $16000 in clothing sales, her paycheck = $150 + (0.1 x 16000) = $1750

thus the correct options are 2,3,5

4 0
2 years ago
Can you find the values of A and B please.
Tom [10]

Answer:

3z

2

Step-by-step explanation:

8 0
2 years ago
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