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elena55 [62]
3 years ago
12

the first few steps in solving the quadratic equation 5x2 27x = 14 − 13x by completing the square are shown. 5x2 27x = 14 − 13x

5x2 40x = 14 5(x2 8x) = 14 which is the best step to do next to solve the equation by completing the square? 5(x2 8x 16) = 30 5(x2 8x 16) = 94 5(x2 8x 4) = 18 5(x2 8x 4) = 34
Mathematics
2 answers:
aliina [53]3 years ago
5 0

Answer:

5 ( x² + 8 x + 16 ) = 94   Answer : B )

Step-by-step explanation:


Artist 52 [7]3 years ago
4 0
The best step to do next is to add 80 to both sides of equation:
5 ( x² + 8 x ) + 80 = 14 + 80
and since  80 =  5 · 16
5 ( x² + 8 x + 16 ) = 94   Answer : B ) 
After that we will continue like this:
5 ( x + 4 )² = 94 
( x + 4 )² = 18.8 ... etc
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Answer:

C.\ 104\ in^2

Step-by-step explanation:

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Let's calculate the front (and back) areas, which are rectangles

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Now with the lateral rectangles which happen to have the very same dimensions

A_2=19.5\ in^2

Next, we compute the front and back triangles of base 3 in and height 1.5 in

A_3=\frac{1}{2}(3)(1.5)=2.25\ in^2

Now, the lateral inclined rectangles of base 3 in and height 2 in

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Finally, the base rectangle who happens to be a square of side 3 in

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Our total area of cardboard is

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The closest option to this answer is

C.\ 104\ in^2

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\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}

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