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3 years ago

Help! Please look at the pic and help me!

Mathematics

2 answers:

inna [77]3 years ago

5 0

Answer:

Step-by-step explanation:

equilateral triangle has all sides So,

perimeter = a+b+c= 12+12+12=36

vladimir2022 [97]3 years ago

5 0

Answer: 36

Equilateral triangles are the same length on every side, since the size of 1 side was given (12) you multiply by 3 (number of sides)
12•3=36

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If A, B, and C are mutually exclusive events with P(A) = 0.2, P(B) = 0.3, and P(C) = 0.4, determine the following probabilities:

fiasKO [112]

a. The events are mutually exclusive, so

$P(A\cup B\cup C)=P(A)+P(B)+P(C)=\boxed{0.9}$

b. For the same reason,

$P(A\cap B\cap C)=\boxed0$

Another way to see this is to use the result from part (a), and the inclusion/exclusion principle:

$P(A\cap B\cap C)=P(A)+P(B)+P(C)-P(A\cup B\cup C)$

and the right side reduces to 0.

c. Same as (b),

$P(A\cap B)=\boxed0$

d. Same as (b),

$P((A\cup B)\cap C)=\boxed0$

We can also use the distributivity rule for unions and intersections to write

$P((A\cup B)\cap C)=P((A\cap C)\cup(B\cap C))=P(A\cap C)+P(B\cap C)=0$

e. If the $A'$ is the complement of $A$ , then by DeMorgan's law,

$P(A'\cap B'\cap C')=P(A\cup B\cup C)'=1-P(A\cup B\cup C)=\boxed{0.1}$

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3 years ago

Juan cuts a piece of paper in half. he then cuts each half into thirds and each of those pieces into eights. finally, he cuts ea

Nookie1986 [14]

Answer:

D: 768

Step-by-step explanation:

First, he divides a piece of paper in half.

$1 \div \frac{1}{2} = 2$

He gets two pieces.

Next, he cuts each of the pieces into three parts.

$2 \div \frac{1}{3} = 6$

Thirdly, he cuts each of the 6 pieces into 8 pieces.

$6 \div \frac{1}{8} = 48$

Lastly, he divides each piece into 16 parts.

$48 \div \frac{1}{16} = 768$

He has 768 pieces in the end. (D)

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3 years ago

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tensa zangetsu [6.8K]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Use a whole number, a fraction, one plus sign, and four 2's to make 23.

alexira [117]

22+2/2=23

22 is whole number
one plus sign
and 2/2 is the fraction
4 digits are 2

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3 years ago

A car traveling at constant speed traveled 161.5 miles in 3 1/2 hours. What was the car's speed.

dedylja [7]

161.5 miles / 3.5 hrs = 46.143 mph

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