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2 years ago

15

A survey found that 30% of teenagers don’t wear a seatbelt. If five teenagers are selected at random, find the probability that

at least three of them don’t wear a seatbelt.

1 answer:

irina1246 [14]2 years ago

5 0

Answer:

60%

Step-by-step explanation:

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joja [24]

Answer:

5

Step-by-step explanation:

Reverse it into n+4 = 9

The answer is <u>5</u>

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8i-(12-4i)+7√-9<br><br> show work please

Tanya [424]

Answer:

33i - 12

Step-by-step explanation:

$8i - (12 - 4i) + 7 \sqrt{ - 9} \\ = 8i - 12 + 4i + 7 \sqrt{9 \times ( - 1)} \\ = 12i - 12 + 7 \times 3 \sqrt{ - 1} \\ = 12i - 12 + 21i \: \: ( \because \sqrt{ - 1} = i)\\ = 12i + 21i - 12 \\ \therefore \red{ \bold{8i - (12 - 4i) + 7 \sqrt{ - 9} }= \purple{ \bold{33i - 12}}}$

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3 years ago

Explain you can use the whole number expression 248 divided by 4 to check that your answer to exercise 2 is reasonable

ella [17]

248/4 = 62
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you do
62*4= 248
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3 years ago

X+7+3x+5=180 bro help

KATRIN_1 [288]

Answer:

x = 42

Step-by-step explanation:

Collect like terms (all x together and constants together)

4x + 12 = 180

4x = 180 - 12

4x = 168

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