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Ksivusya [100]
3 years ago
9

In which group of statements is the conclusion not justified by the previous pair of statements?

Mathematics
1 answer:
kvasek [131]3 years ago
5 0
C i believe hope it helps
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What is equivalent to 0 = 2x2 - 16x – 18 when completing the<br> square?
algol13

Answer:

x = 1

x = -9

Step-by-step explanation:

(2x2 +  16x) -  18  = 0

2x2 + 16x - 18  =   2 • (x2 + 8x - 9)

x2 + 8x - 9

 -9    +    1    =    -8

     -3    +    3    =    0

     -1    +    9    =    8

 2 • (x + 9) • (x - 1)  = 0

2   =  0

x+9 = 0  

x = -9

x-1 = 0

x = 1

x2 + 8x - 9  = 0

  x2+8x = 9

(x+4) • (x+4)  =

 (x+4)2

x2+8x+16 = 25 and

  x2+8x+16 = (x+4)2

(x+4)2 = 25

x = -4 + √ 25

 x2 + 8x - 9 = 0

has two solutions:

 x = -4 + √ 25

  or

 x = -4 - √ 25

           

           - B  ±  √ B2-4AC

 x =   ————————

                     2A

A   =     1

                     B   =    8

                     C   =   -9

B2  -  4AC   =

                    64 - (-36) =

                    100

 -8 ± √ 100

  x  =    —————

                   2

  x  =  ( -8 ± 10) / 2

x =(-8+√100)/2=-4+5= 1.000

or:

x =(-8-√100)/2=-4-5= -9.000

Answer:  x = 1

x = -9

6 0
3 years ago
Roxanne bought a 40-inch television that measures 24 inches in height. What is the width of the television?
Natali5045456 [20]

Answer:

The width is 32 inches

Step-by-step explanation:


3 0
3 years ago
Which solutions is the correct one?
Debora [2.8K]

Answer:

Apoint on negative x-axis

5 0
3 years ago
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Which of the following scenarios demonstrates an exponential decay? A. A tennis tournament in which after each round, half the p
Sliva [168]

Answer:

A. A tennis tournament in which after each round, half the players are eliminated.

Step-by-step explanation:

6 0
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Rearrange the formula to make x the subject.<br><br> y = 4x + 3
allochka39001 [22]

Answer:

x=\frac{y-3}{4}

Step-by-step explanation:

y=4x+3

y-3=4x

\frac{y-3}{4}=x

x=\frac{y-3}{4}

4 0
3 years ago
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