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maw [93]
3 years ago
9

Find the solution set 2x^2 -2x -4 =0please use a comma to separate your answer.

Mathematics
1 answer:
mariarad [96]3 years ago
7 0

Answer:

2,-1

Step-by-step explanation:

2x^2 -2x -4 =0

Factor out a 2

2(x^2 -x-2) =0

What 2 number multiply to -2 and add to -1

-2*1 = -2

-2 +1 = -1

2(x-2) (x+1) =0

Using the zero product property

x-2 = 0               x+1 = 0

x-2+2=0+2       x+1-1=0-1

x=2                   x=-1

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Pls explain your answer
spayn [35]

Yo sup??

this is of the form called slope and point... hence

y-11=-4(x+2)

therefore the correct answer is option A

Hope this helps

8 0
3 years ago
Can someone plz help me dont know the awnser
Bumek [7]
The area of the right triangle = \frac{1}{2}bh

b = base = SV = 12.3
h = hight = HL = 24.6
A = area
\frac{1}{2}bh = A
\frac{1}{2}(12.3)(24.6) = 151.29
4 0
3 years ago
The Cinema Center consists of four theaters: Cinemas I, II, III, and IV. The admission price for one feature at the Center is $5
zzz [600]

Answer:

a) Matrix B = \left[\begin{array}{c}5\\7\\9\end{array}\right]

b) Matrix AB = \left[\begin{array}{c}2525\\3620\\2845\\3705\end{array}\right]

c) $12,695

Step-by-step explanation:

Matrix A = \left[\begin{array}{ccc}225&110&70\\95&160&225\\280&65&110\\0&240&225\end{array}\right]

a) Matrix B = \left[\begin{array}{c}5\\7\\9\end{array}\right]

Gross Receipt = AB

\left[\begin{array}{ccc}225&110&70\\95&160&225\\280&65&110\\0&240&225\end{array}\right] . \left[\begin{array}{c}5\\7\\9\end{array}\right] = \left[\begin{array}{c}2525\\3620\\2845\\3705\end{array}\right]

c) Total revenue is the sum of receipts from 4 cinemas given in part b

Hence,

Total revenue = $2525 + $3620 + $2845 + $3705 = $12,695

3 0
3 years ago
Find the volume of the cylinder<br> Type an exact answer in terms of pi
ZanzabumX [31]

Answer:

648pi

Step-by-step explanation:

V=pi*r^2*h

V=pi*9^2*8

V=pi*81*8

V=648pi

7 0
3 years ago
Eric walked 6 laps in 36 minutes. Sally walked 3 laps in 18 minutes. Determine if the given ratios are equivalent?
zhuklara [117]

Step-by-step explanation:

6:36 = 6/36 = 1/6

3:18 = 3/18 = 1/6

therefore this ratios are equivalents...

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5 0
3 years ago
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