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Luden [163]
3 years ago
10

If b is the midpoint of ac and ac = 8x-20, find bc

Mathematics
1 answer:
KengaRu [80]3 years ago
7 0

Answer:

BC=4x-10

Step-by-step explanation:

B is the Mid point of AC . hence the length of  BC will be half of AB

AC = 8x-20

Hence AB=BC = \frac{8x-20}{2}

BC=4x-10

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Lesson Posttest
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1

Step-by-step explanation:

Probability = number of fruit type/total number of fruit. Total number of fruit = 5 + 9 + 5 = 19.

The probability of drawing an apple is P(apple) = number of apples/total number of fruit = 5/19.

The probability of drawing a peach is P(peach) = number of peaches/total number of fruit = 9/19

The probability of drawing an apple is P(orange) = number of oranges/total number of fruit = 5/19

The probability of drawing either an apple, peach or orange at the first draw of fruit from the bag is

P(apple or peach or orange) =  P(apple) + P(peach) + P(orange)

                                               = 5/19 + 9/19 + 5/19

                                               = (5 + 9 + 5)/19

                                               = 19/19

                                               = 1

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