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garri49 [273]
3 years ago
9

Select all of the true statements. Explain only why the statements are true.

Mathematics
1 answer:
Fiesta28 [93]3 years ago
3 0

Answer:

B

Step-by-step explanation:

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What is a number mulitplyed by 8 and added by 6?
HACTEHA [7]
Xy = 8
x + y = 6

     x + y = 6
x - x + y = -x + 6
           y = -x + 6

                                 xy = 8
                       x(-x + 6) = 8
                   x(-x) + x(6) = 8
                        -x² + 6x = 8
                   -x² + 6x - 8 = 0
     -1(x²) - 1(-6x) - 1(8) = 0
              -1(x² - 6x + 8) = 0
                          -1           -1
                    x² - 6x + 8 = 0
             x² - 4x - 2x + 8 = 0
 x(x) - x(4) - 2(x) + 2(4) = 0
           x(x - 4) - 2(x - 4) = 0
                  (x - 2)(x - 4) = 0
      x - 2 = 0    or    x - 4 = 0
        + 2 + 2             + 4 + 4 
           x = 2       or      x = 4

   x + y = 6
   2 + y = 6
 - 2        - 2
         y = 4
   (x, y) = (2, 4)

           or
    x + y = 6
    4 + y = 6
  - 4        - 4
          y = 2
    (x, y) = (4, 2)

The two numbers that add up to 6 and multiply to 8 are 4 and 2.
8 0
3 years ago
What do you add to 4 and 2/9 to make 7?
sveta [45]
2 and 7/9 is the answer
8 0
4 years ago
A bad contains two red marbles, six blue marbles and seven green marbles. If two marbles are drawn out of the bag, what is the p
Luba_88 [7]

Answer:

1/105

Step-by-step explanation:

Total Marbles= 2+6+7=15

2/15 * 1/14 = 2/210 = 1/105

(It becomes 1/14 since you take out own red marble)

8 0
2 years ago
the ski club with ten members is to choose threeoffiicers captain, co-captian&secretary;how many ways can those offices be f
Dmitry_Shevchenko [17]
Slot method
10 choices for 1st slot
9 for 2nd
8 for 3rd

10*9*8=720

720 ways
8 0
3 years ago
Represent the following sentence as an algebraic expression, where "a number" is the letter x.
matrenka [14]
By the difference of "5 and a number", I assume you mean that number minus 5. In that case, the expression is 8 times (x-5).

If by "the difference of 5 and a number" you mean 5 minus that number, then the expression is 8 times (5-x).
7 0
4 years ago
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