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SOVA2 [1]
3 years ago
11

Solve each equation. Round your answers to the nearest ten-thousandth. Please show work. Part 3A​

Mathematics
1 answer:
Butoxors [25]3 years ago
5 0

Answer:

19.

      log9(5x^2 + 10) - log9(10) = 1

<=> log9((5x^2 + 10)/10) = log9(9)

<=> (5x^2 + 10)/10 = 9

<=> 5x^2 + 10 = 90

<=> 5x^2 = 80

<=> x^2 = 16

<=> x = +/- (4)

20.

      log5(2x^2 + 4) + log5(3) = 2

<=> log5((2x^2 + 4) x 3) = log3(9)

<=> 6x^2 + 12 = 9

<=> 6x^2 = -3

 => No real x satisfies.  ( x^2 always larger or equal to 0)

21.

      log6(8) + log6(7 - 2x^2) = 2

<=> log6(8 x (7 - 2x^2)) = log6(36)

<=> 56 - 16x^2 = 36

<=> 16x^2 = 20

<=> x^2 = 5/4

<=> x = +/- sqrt(5/4)

Hope this helps!

:)

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4 years ago
–9x + 9y = 9<br> y = –7<br><br> (<br> , <br> )
Y_Kistochka [10]

Answer:

x=-8

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Step-by-step explanation:

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6 0
3 years ago
What is the value of the y coordinate of any point on the x axis?
Leona [35]

The value of the y coordinate of any point on the x axis is always 0.

<u><em>Explanation</em></u>

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Now if the point lies on the x-axis, that means the distance of the point from x-axis will be 0. Thus, the value of 'b' will be 0.

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5 0
3 years ago
Is it possible for two equations to have more than one solution? what would that look like?​
goblinko [34]
Its a little complicated, so I cant rlly explain it on here. But yes, 2 questions can have more than one solution. Like how theres a problem in a story, but theres plenty of solutions to solve it.
5 0
3 years ago
Which is equal to 7(3.5x10^4)written in scientific nation
k0ka [10]
The answer is 2.45 x 10^5. 

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Add the number of times you moved the decimal point to the exponent (The 4 in the original equation).

2.45 x 10^5.

I hope this helps!

5 0
3 years ago
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