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fiasKO [112]
3 years ago
9

Question

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
5 0
-3 because if you add -3 to 3 you get 0
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Solve each equation. Round your answers to the nearest ten-thousandth. Please show work. Part 3A​
Butoxors [25]

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!

:)

5 0
3 years ago
Alan, Bill, and Calvin are playing a game with collectible cards. At the moment, Alan has 11 less than 2.5 times the number of c
oksian1 [2.3K]

Answer:

50

Step-by-step explanation:

I'm sorry but your missing the questions but I found a close answer! Let A be the number of cards Alan has B be the number of cards Bill has C be the number of cards Calvin has Alan had 11 less than 2 1/2 times the number of cards bill has. is 2.5 Alan is 2.5 of bill has minus 11 A=2.5B -11 Calvin has 1 more than 1 1/2 times the number of cards bill has. is 1.5 Calvin is 1.5 of bill has plus 1 C=1.5B + 1 Alan and Calvin have the same number of cards So A=C WE plug in A  and C equations and solve for B 2.5B -11 = 1.5B + 1 (subtract 1.5B on both sides) 1B -11 = 1 (Add 11 on both sides) B = 12 If Alan and Calvin have the same number of cards, the number bill has is 12 The number of cards Alan and Calvin each have is 19 Total cards = 12 + 19 + 19 = 50 If Alan, bill, and Calvin have all the cards in the deck then the deck has 50 cards.

3 0
2 years ago
Diagram not drawn to scale<br> please helppp
pychu [463]

Answer:

144?

Step-by-step explanation:

8 0
2 years ago
The base of a prism is a regular hexagon with the perimeter of 78mm the height of the prism is 16mm what is the area of one of t
kifflom [539]
The perimeter is the sides of the hexagon. One of the hexagon edges is shared with a rectangular face. Solve for that edge. 78/6=13. The height is the length and edge is the width. Area is length(16) times width(13). 16•13=208. The answer is 208mm^2

3 0
3 years ago
X + y &gt; -3<br>how do I find the ordered pair and a solution to this inequality ​
AURORKA [14]

Answer:

x>-3-y

Step-by-step explanation:

subtract y from both sides

8 0
2 years ago
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