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MariettaO [177]
3 years ago
12

The first few steps in solving a quadratic equation 8x^2+80x=-5 by completing the square shown the last step is 8(X^2+10 X +25)=

-5+ blank what number is missing in the last step
Mathematics
1 answer:
olganol [36]3 years ago
6 0

Answer:

25

Step-by-step explanation:

it makes the most sense

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students set up 6 rows of seats for a music concert. they put 6 seats in each row. what is the total number of seats? solve this
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Step-by-step explanation:

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Solve for g.<br><br> 8g + 3 = –6g + 13g + 13
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Answer: g = 10

Step-by-step explanation: 8g + 3 = –6g + 13g + 13

                                             8g + 3 = (–6g + 13g) + (13)

                                             8g + 3 = 7g + 13

                                             8g + 3 - 7g = 7g + 13 - 7g

                                             g + 3 = 13

                                             g + 3 - 3 = 13 - 3

                                             g = 10                                            

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3 years ago
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What is the radius of a circle with an area of 78.5 cubic inches? Use 3.14 for pi. Enter your answer in the box.
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\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ A=78.5 \end{cases}\implies 78.5=\pi r^2\implies \cfrac{78.5}{\pi }=r^2 \\\\\\ \sqrt{\cfrac{78.5}{\pi }}=r\implies 4.9987\approx r

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