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never [62]
3 years ago
15

Find the value or values of the Y in the quadratic equation y squared + 4 y + 4 equals 7

Mathematics
1 answer:
QveST [7]3 years ago
6 0
Y² + 4y + 4 = 7
             - 7  - 7
 y² + 4y - 3 = 0
               y = -(4) ± √((4)² - 4(1)(-3))
                                   2(1)
               y = -4 ± √(16 + 12)
                                 2
               y = -4 ± √(28)
                            2
               y = -4 ± 2√(7)
                            2
               y = -2 ± √(7)
               y = -2 + √(7)    U    y = -2 - √(7)
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What single transformation can take you from A (3, 1) to A" (-7, 1) in one move?
Arisa [49]

Answer: A reflection (Across the y-axis)

Step-by-step explanation:

Transformation possiblitites:

Translation: After plotting the points you gave I came to the conclusion that a translation could not be the right transformation due to the fact that the point would move away the same units on a graph as the original point.

Rotation: The new point doesn't seem when graphed to have rotated, as it remained across from the orignial point on the graph.

Dilation: The new point if dilated wouldn't be in close proximity with the original point.

3 0
3 years ago
Jacob earns $19.00 for walking 4 dogs. How much money would he earn for walking 7 dogs? Walking 8 dogs? 1 dog?
VMariaS [17]

Answer:

$19.00 = 4x

Divide 4 on both sides

4.75 = x He ears $4.75 for one dog

$4.75(x)

$4.75(7 dogs)

= $33.25

--------------

$4.75(x)

$4.75(8 dogs)

= $38

7 0
3 years ago
An experiment consists of choosing objects without regards to order. Determine the size of the sample space when you choose the
sdas [7]

Answer:

a

    n=  75, 582

b

  n=    2300

c

  n =   253

Step-by-step explanation:

     Generally the size of the sample sample space is  mathematically represented as

           n  =   \left N } \atop {}} \right.  C_r

Where   N is the total number of objects available and  r is the  number of objects to be selected

    So  for  a,  where N = 19  and r = 8  

         n  =   \left 19 } \atop {}} \right.  C_8 =  \frac{19 !}{(19 - 8 )! 8!}

                           =     \frac{19 *18 *17 *16 *15 *14 *13 *12 *11! }{11 ! \ 8!}

                           n=  75, 582

    For  b  Where  N  = 25 and  r  =  3

           n  =   \left 25 } \atop {}} \right.  C_3 =  \frac{25 !}{(19 - 3 )! 3!}

                             =     \frac{25 *24 *23 *22 !  }{22 ! \ 3!}

                             n=    2300

   For  c  Where  N  = 23 and  r  =  2

            n  =   \left 23 } \atop {}} \right.  C_2 =  \frac{23 !}{(23 - 2 )! 2!}

                              =     \frac{23 *22 *21!  }{21 ! \ 3!}

                              n =   253

4 0
3 years ago
Sarah has 13 stickers. Sissy has 28 stickers. Sissy divides her stickers into 4 equal groups.
777dan777 [17]

Answer:

She gave 7 stickers.13+7=20.sarah has 20 stickers

Step-by-step explanation:

Divide 28 by 4

7 0
2 years ago
HELP PLSS<br><br> What is the slope of the line that passes through the points (-2, -5) and (6, 7)?
Serjik [45]

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slope =  \frac{7 - ( - 5)}{6 - ( - 2)}  \\

slope =  \frac{7 + 5}{6 + 2}  \\

slope =  \frac{12}{8}  \\

slope =  \frac{4  \times 3}{4 \times 2}  \\

slope =  \frac{3}{2}  \\

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

3 0
3 years ago
Read 2 more answers
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