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butalik [34]
3 years ago
10

9x^2 - 42x + 49 NEED HELP SOLVING QUADDRATIC EQUATION

Mathematics
1 answer:
masya89 [10]3 years ago
6 0

Answer:

x = 7/3

Step-by-step explanation:

Factors of 9 are:

3x3

9x1

Factors of 49 are:

7x7

49x1

Only 3x3 and 7x7 equal 42 when you expand it out                                            (3x - 7)(3x - 7) = 0

x = 7/3

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Many people who bought Z-Game gaming systems over the holidays have complained that the systems they purchased were defective. I
Bas_tet [7]

Answer:

The upper limit for the 95% confidence interval for the population proportion of defective gaming systems is 0.022

Step-by-step explanation:

Upper Limit for 95% Confidence Interval can be calculated using p+ME where

  • p is the sample proportion of defective gaming systems (\frac{18}{1200} = 0.015)
  • ME is the margin of error from the mean

and margin of error (ME) around the mean can be found using the formula

ME=\frac{z*\sqrt{p*(1-p)}}{\sqrt{N} } where

  • z is the statistic of 95% confidence level (1.96)
  • p is the sample proportion (\frac{18}{1200}=0.015
  • N is the sample size (1200)

Using the numbers we get:

ME=\frac{1.96*\sqrt{0.015*0.985}}{\sqrt{1200} } ≈ 0.007

Then upper limit for the population proportion is 0.015+0.007 =0.022

4 0
4 years ago
Convert the decimal 0.92 to a fraction.<br> 83<br> 9<br> 83<br> 100<br> 83<br> 90
bogdanovich [222]

Answer:

options: 83/90 92/99 83/9 83/100. 0.92 = 92 / 100

Step-by-step explanation:

3 0
3 years ago
The centre of a triangle must always be found inside the triangle. Illustrate the statement with examples or deny the statement
Alla [95]

The center of a triangle must always be found inside the triangle given that it is concurrent point of the three median lines of the triangle all three of which are located only inside of the triangle

The examples of the properties of the center of a triangle are;

  1. The center of the triangle is the centroid of the triangle which is the point of concurrency of the three medians of the triangle, where a median line is the line which connects a vertex to the midpoint of the side opposite the vertex inside the triangle
  2. Each median line divides the area of the triangle in half, and given that the area of the triangle is equal to half the altitude, multiplied by the length of the base side of the triangle, the three medians of a triangle are related and share a common concurrent point <em>inside</em> the triangle such the perpendicular distance from the concurrent point of the three medians to each of the three side is less than the altitude of the triangle

Given that the three medians are located inside the triangle therefore, based on the location of the center of the triangle on the medians of the triangle, the center of the triangle must always be found inside the triangle

Learn more about the centroid of a triangle here;

brainly.com/question/16482898

3 0
3 years ago
does anyone know what 4/9 - 3/9 - 5/9 + 5 - 8 is simplified? if u do it would help me greatly. thank you.
AleksandrR [38]

Answer:

  -3 4/9

Step-by-step explanation:

The fractions all have the same denominator, so are easily added.

Of course, you know how to add signed integers.

  4/9 - 3/9 - 5/9 + 5 - 8

  = (4 -3 -5)/9 +(5 -8)

  = -4/9 -3

  = -(3 4/9)

7 0
3 years ago
Four streets feed into a roundabout circle as shown below. If the diameter of the
Natasha2012 [34]

Answer: 119.1ft............

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3 years ago
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