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aliya0001 [1]
3 years ago
13

I need the work to be shown please

Mathematics
1 answer:
Otrada [13]3 years ago
3 0

Answer:

Sorry cant find the answer but i hope you got it right and if you didn't you'll still do great. :)

Step-by-step explanation:

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How to solve each equation by completing a square -4x^2+10x-40=-9x^2
Ilia_Sergeevich [38]

Answer:

x = -4 or 2

Step-by-step explanation:

-4x² + 10x − 40 = -9x²

First, move the x terms to one side and the constant to the other.

5x² + 10x = 40

Divide by the leading coefficient:

x² + 2x = 8

Take half of the b coefficient, square it, then add to both sides.

(2/2)² = 1

x² + 2x + 1 = 8 + 1

x² + 2x + 1 = 9

Factor the perfect square:

(x + 1)² = 9

Solve for x:

x + 1 = ±3

x = -1 ± 3

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6 0
3 years ago
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Answer:

h =  2A / (b1 + b2)

Step-by-step explanation:

A = 1/2h (b1 + b2)

Divide both sides by 1/2 (b1 + b2)

h  =  A / 1/2 (b1 + b2)

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3 years ago
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Mrs. James is planning to purchase one of two household appliance contracts. Company A offers a repair contract that covers an u
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Answer:

Company B's offer is more cost effective

Step-by-step explanation:

Expected no. of repairs:

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Sauna spent 4/5 of her allowance on food and shopping what fraction of her allowance had she left
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Answer: 1/5

Step-by-step explanation: You just subtract 4/5 from 1, or 5/5. And BOOM! you get 1/5.

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