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Digiron [165]
3 years ago
15

What number would you add to both sides of x2 + 7x = 4 to complete the square?

Mathematics
2 answers:
pashok25 [27]3 years ago
8 0

<u>Answer</u>

12.25


<u>Explanation</u>

x² + 7x = 4

The number that should be added on both sides is the square of half the coefficient of x.

That is (7/2)².

(7/2)² = 7²/2²

         = 49/4

          = 12.25

∴<em> x² + 7x + 3.5² = 4 + 12.25</em>

<em>  (x +  3.5) ² = 16.25</em>


 


galina1969 [7]3 years ago
8 0

Answer:(7/2)2


Step-by-step explanation:the answer is (7/2) to the second power.


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Find the area bounded by the graphs of the indicated equations over the given interval.
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Answer:

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Step-by-step explanation:

y = 0

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8 0
2 years ago
How many pounds of cashews that cost $14 per pound must be mixed with 5 pounds of peanuts that cost $6.50 per pound to make mixe
Fantom [35]

The amount of cashew mixed is 5 pounds

<h3>Word problem on total cost</h3>

Cost of 1 pound of cashew = $14

Cost of 1 pound of peanut = $6.50

Total cost of 1 pound of the mixed nuts = $10.25

Cost of 5 pounds of peanuts = 5 x $6.50

Cost of 5 pounds of peanuts = $32.50

Let the amount of cashew  be x

Total cost of x cashew = 14x

Total amount of the mixed nuts = x + 5

Total cost of the mixed nuts = 10.25(x+5)

Total cost of the mixed nuts = 10.25x + 51.25

14x  +  32.50  =  10.25x  +  51.25

14x - 10.25x  =  51.25  -  32.50

3.75x  =  18.75

x  =  18.75/3.75

x  =  5

Therefore, the amount of cashew mixed is 5 pounds

Learn more on word problem on cost here: brainly.com/question/21405634

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If u times 23 by 10 shouldn't u get 230 but my teacher says that's not it u have to did everything but I don't know what to did
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