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faust18 [17]
3 years ago
13

Bruno needs to solve the equation x2 + 6x – 8 = 0 by completing the square. Which pair of steps is the most efficient way to beg

in?

Mathematics
2 answers:
sp2606 [1]3 years ago
8 0
First think of the form a^2 + 2c + c^2

c in the question is clearly 3.

So we need first to add 8 for both sides to get rid of -8 and then add 9 to complete the square.

So it will be (x^2+3)^2 = 17

So the choice number 3 is the answer.

Hope this helps!
goldfiish [28.3K]3 years ago
4 0

Answer:

the third one

Step-by-step explanation:

hope this helps

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Right triangles are similar. Always Sometimes Never
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Answer:

Always

Step-by-step explanation:

Right triangles are always similar.

All right triangles have a 90 degree angle.

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What is the area of the parallelogram?<br> 15 cm<br> 21 cm<br> 20 cm
padilas [110]

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Its either 300 or 315

Step-by-step explanation:

Mainly because 20 ×15= 300 but the triangles on the side, I can't figure it out. I eliminated 82 and 420, 420 mainly because I got it wrong and 82 doesn't make sense.

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Vladimir79 [104]

X is 5

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3 years ago
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At a local grocery store, bananas were on sale. Green bananas were priced at $14.00 and yellow bananas were priced at $12.00. Sa
garri49 [273]

Answer:

Sabrina bought 6 yellow bananas and 3 green bananas

Step-by-step explanation:

Let

Green bananas = x

Yellow bananas = y

Green bananas = $14.00

Yellow bananas = $12.00

Total cost = $114.00

x + y = 9 (1)

14x + 12y = 114 (2)

From (1)

x = 9 - y

Substitute x = 9 - y into (2)

14(9 - y) + 12y = 114

126 - 14y + 12y = 114

- 14y + 12y = 114 - 126

-2y = -12

Divide both sides by -2

y = -12 / -2

= 6

y = 6

Substitute y = 6 into (1)

x + y = 9

x + 6 = 9

x = 9 - 6

= 3

x = 3

Sabrina bought 6 yellow bananas and 3 green bananas

3 0
2 years ago
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