1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Dimas [21]
3 years ago
8

Solve 9x2 + 6 = 12x

Mathematics
1 answer:
Oksana_A [137]3 years ago
7 0

Step-by-step explanation:

9x² + 6 = 12x

3x² + 2 = 4x

3x² − 4x + 2 = 0

Use quadratic formula.

x = [ -b ± √(b² − 4ac) ] / 2a

x = [ -(-4) ± √((-4)² − 4(3)(2)) ] / 2(3)

x = [ 4 ± √(16 − 24) ] / 6

x = [ 4 ± √(-8) ] / 6

x = (4 ± 2i√2) / 6

x = (2 ± i√2) / 3

You might be interested in
Find the sum <br> (-8z+4)+(8z-7)
padilas [110]

Answer:

-3

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
The contents of a sample of 26 cans of apple juice showed a standard deviation of 0.06 ounces. We are interested in testing to d
NikAS [45]

Answer:

Option b. should not be rejected

Step-by-step explanation:

We are given that the contents of a sample of 26 cans of apple juice showed a standard deviation of 0.06 ounces.

We have to test whether the variance of the population is significantly more than 0.003, i.e.;

  Null Hypothesis, H_0 : \sigma = \sqrt{0.003}

Alternate Hypothesis, H_1 : \sigma > \sqrt{0.003}

The test statistics used here for testing variance is;

          T.S. = \frac{(n-1)s^{2} }{\sigma^{2} } ~ \chi^{2}__n_-_1

where, s = sample standard deviation = 0.06

           n = sample size = 26 cans

So, Test statistics = \frac{(26-1)0.06^{2} }{0.003 } ~ \chi^{2}__2_5

                            = 30

So, at 5% level of significance chi square table gives critical value of 37.65 at 25 degree of freedom. Since our test statistics is less than the critical so we have insufficient evidence to reject null hypothesis.

Therefore, we conclude that null hypothesis should not be rejected and variance of population is 0.003.

5 0
3 years ago
The speed limit on a highway is 70 miles per hour. About how fast is this in miles per minute?
Lady bird [3.3K]
The speed of this:
70 miles per hour

1 hour = 60 minutes

70/60 = 7/6

around 1 1/6 mile per minute

hope this helps
7 0
3 years ago
A triangle with an area of 37 units? is dilated by a scale factor of . Find the area of
sergeinik [125]

Answer:

<u>58 units</u>

Step-by-step explanation:

I decided that one side is 37 units and another is 2 units, since that would make the area 37 units. (you can also use 74 units and 1 unit)

Then I multiplied 37 by 5/4, which equals a new length of 46.25 units, and I also multiplied 2 by 5/4, which equals a new length of 2.5 units.

Finally, I solve for the area of the triangle:

1/2(46.25 x 2.5) ≈ <u>58 units</u> (rounded to the nearest whole number)

7 0
2 years ago
<img src="https://tex.z-dn.net/?f=%28%20-%20x%20%2B%203%29%20-%20%284x%20-%2010%29" id="TexFormula1" title="( - x + 3) - (4x - 1
VladimirAG [237]

Answer:

-5x+13 given (-x+3)-(4x-10)

Answer:-5x+13

Step-by-step explanation:

We are going to distribute to get rid of the ( ):

-x+3-4x+10

Pair up like terms:

-x-4x+3+10

Combine the like terms:

-5x+13

5 0
3 years ago
Read 2 more answers
Other questions:
  • Sooooooo what While scuba diving, Rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another
    14·1 answer
  • Please help picture shown
    12·1 answer
  • The distance from a focus to a vertex on the graph of a parabola is not the same as the distance from vertex to a perpendicular
    8·1 answer
  • Solve each equation. check your sloution.<br><br>7a=63
    7·2 answers
  • Pls help im like 5 hrs behind in math
    6·1 answer
  • What is the factor of <br><img src="https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B4%7D%20%20-%20x" id="TexFormula1" title=" {x}^{4} -
    6·1 answer
  • You have 576 feet of fencing to enclose a rectangular plot of land. Find the dimensions of the rectangular plot that would maxim
    15·1 answer
  • A flying disc has a circumference of 81.64 centimeters. What is the area of the flying disc? Use 3.14 for pi
    12·1 answer
  • Answer pls I need help . I’ll make you brainliest and plus 10 points
    14·1 answer
  • Number of spots
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!