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mars1129 [50]
3 years ago
14

Use the quadratic formula to solve the equation​. 9x2−7x+1=0 Enter your answers, in simplified radical form. x = x =

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

Answer:

x=\frac{\sqrt{13}-7 }{18} ,x=\frac{-\sqrt{13}-7 }{18}

Step-by-step explanation:

I'm not too good with the quadratic formula so I'm going to complete the square.

First divide everything by 9 and move the 1 to the other side.

x^2-\frac{7}{9}=-\frac{1}{9}

Then take half of \frac{7}{9} and square it and add it to both sides.

x^2-\frac{7}{9} +\frac{49}{324}=\frac{13}{324}

Now you can factor it.

(x-\frac{7}{18})^2=\frac{13}{324}

Square root:

x-\frac{7}{18}=\frac{\sqrt{13} }{18}

x=\frac{\sqrt{13}-7 }{18} ,x=\frac{-\sqrt{13}-7 }{18}

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Mashcka [7]

8 halls would be required to accommodate 520 people in the hall.

As we know that a hall can accommodate 65 people.

To determine the number of hall required for 520 people,

first we need to find that how many halls would be required for one person,

So, we will divide the 1 by 6 to find :

The number of one person accommodate = 1/65 Hall

Then, 520 people required to accommodate = 1/65 × 520

                                                                      = 8 Halls.

[Accommodate: to have enough space for somebody/something, especially for a certain number of people]

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1 year ago
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Greeley [361]

Answer:

  0.15x

Step-by-step explanation:

15% of anything is 15/100 or 0.15 of it. You find that value by multiplying the "anything" by 0.15.

Since we don't know the value of x, the best we can do is show that the number of interest is x multiplied by 0.15.

8 0
4 years ago
What is 0.0000000345 in scientific notation?
spin [16.1K]
Since the number is less that 1, the exponent will be a negative.
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4 years ago
Please help me!<br><br><br> Thanks
o-na [289]

Answer:

a) Graph are attached ,Red line shows the function y=3x-2 while blue line represents the function y=-5

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Step-by-step explanation:

b)To solve a system of linear equations graphically we graph both equations in the same coordinate system. The solution to the system will be in the point where the two lines intersect.

c)Given that

y=-5

and y=3x-2

compare the right hand side of the above two equation and solve for x

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or 3x=-3

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3 years ago
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Mrrafil [7]

Answer :

There are two cases in this problem :

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4 years ago
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