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2 years ago

Mark which expressions are equivalent to 8 –2(5x –3). Explain or show work to justify your decision.

Mathematics

1 answer:

pickupchik [31]2 years ago

5 0

Answer:

Explanation: Equivalent:

6 x 5x, 6 x -3 30x - 18

Combine like terms, (8 + 6) (10x) 10x - 14

8 - (-6) (10x) 10x - 14

8 -(-6) (-10x) -10x - 14

(2 x -5x = -10x) (2 x 7 = 14) 2(-5x + 7)

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A fair coin and a biased coin where the probability of obtaining a head is twice the probability of obtaining a tail. if both ar

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Answer:

See below in bold.

Step-by-step explanation:

For the fair coin Prob(head) = 1/2 and Prob(Tail) = 1/2.

For the biased coin it is Prob(head) = 2/3 and Prob(Tail) = 1/3.

a) Prob(2 heads) = 1/2 * 2/3 = 1/3.

b) Prob(2 tails) = 1/2 * 1/3 = 1/6.

c) Prob(1 head ) = Prob(H T or T H) = 1/2 * 1/3 + 1/2 * 2/3) = 1/6+1/3 = 1/2.

d) Prob (at least one head) = prob (HH or TH or HT) = 1/3 + 1/2 =<em> </em>5/6.

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3 years ago

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3 years ago

What numerical expression represents the phrase: the difference of 4 cubed 25

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2 years ago

Read 2 more answers

What is the area of the trapezoid?

ratelena [41]

Answer:

29.5 inches squared

Step-by-step explanation:

The formula for the area of a trapezoid is $\frac{base1 + base2 * height}{2}$ ,

so base1 = 14 inches and base2 = 30 inches

since there is a right angle, you know that the height must equal the length of the left side, so the height = 15 inches

then, 14+30+15=59 and 59/2=29.5

therefore, your answer would be 29.5 inches squared

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2 years ago