MATHEMATICS HIGH SCHOOL

What is the circumference of a circle with a diameter of 45 centimeters? A. 282.7 centimeters
B. 70.7 centimeters
C. 6,361.7 centimeters
D. 141.4 centimeters

Answers

Answer 1
Answer: Circumference, C = πd
d = diameter.

C = π*45

C = 45π

C ≈ 45*3.142

C≈ 141.39

C ≈ 141.4

Option D.
Answer 2
Answer: It is 141.4 centimetres. This is because the circumference is obtained by multiplying pi with the diameter.

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Johnathon has 3 balls and his dog takes one and rips it in half, how many balls does he have now?

Answers

He has three balls. Two which are complete and one that has two halves. Or he only has 2 and one that he can't play with anymore

Solve the proportion. 10/a =15/30
a. 2
b. 5
c. 20
d. 10

Answers

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300=15a
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a family has five children The probability of having a gil is 1/2 What is the probability of having exactly 2 girls out of five children

Answers

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A couple decided to have 4 children. What is the probability that they will have at least two boys?

Answers

See below the theee of possibilities:

BBBB
BBBG
BBGB
BBGG
BGBB
BGBG
BGGB
BGGG
GBBB
GBBG
GBGB
GBGG
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There are 16 differents possibilities.
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The rational and the irrational numbers together are called whole numbers. true or false
​

Answers

the answer is false

Step-by-step explanation:

natural numbers and zero are whole numbers

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Solve the system my elimination 9x + 2y = 9 6x - 2y = -4

Answers

Answer:

x = 1/3   y= 3

Step-by-step explanation:

9x + 2y = 9

6x - 2y = -4

Add the two equations to eliminate y

9x + 2y = 9

6x - 2y = -4

----------------------

15x   = 5

Divide each side by 15

15x/15 = 5/15

x = 1/3

Now we need to find y

6x - 2y = -4

6(1/3) -2y = -4

2 -2y = -4

Subtract 2 from each side

2-2y-2 = -4-2

-2y = -6

Divide each side by -2

-2y/-2 = -6/-2

y = 3
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