3 years ago

Select one:

Mathematics

1 answer:

Akimi4 [234]3 years ago

8 0

A i believe hopefully that is the right answer

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Which of the expressions below are equal to 3x + 9y + 15? Select all that apply.

devlian [24]

Answer:
C) 3(x + 3y + 5)
D) 3x + 3(3y +5)

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3 years ago

Jane calculated the circumference of a circle to be 36π. what is the area if the circle

marshall27 [118]

Answer:

103.13

Step-by-step explanation:

A=πr2

C=2πr

A=C2

4π=362

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Triangle BCD is isosceles and line Bc is congruent to line BD. What is the measure of arc BC?

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How to find x in a quadrilateral

evablogger [386]

X = 360 - (122+58+58)
x = 360 - 238
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3 years ago

Probability The average time between incoming calls at a switchboard is 3 minutes.if a call has just come in,the probability tha

Stels [109]

Answer:

a) 0.1535

b) 0.4866

c) 0.8111

Step-by-step explanation:

The probability that the next call come within the next t minutes is:

$p(t) = 1 -e ^{- t/3}$

According to this model,

a) the probability that a call in comes within 1/2 minutes is $p(t) = 1 -e ^{- (1/2)/3}$ =0.1535

b) the probability that a call in comes within 2 minutes is $p(t) = 1 -e ^{-2/3}$ =0.4866

c) the probability that a call in comes within 5 minutes is $p(t) = 1 -e ^{-5/3}$ =0.8111

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3 years ago