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2 years ago

Jonathan records how 90 pupils travelled to school on one day and represents this information on the pie chart below.

Mathematics

1 answer:

xeze [42]2 years ago

4 0

Answer:

86.4

Step-by-step explanation:

First adding up all the percentages on the chart you get 360

Then figuring out what 24° of 360 is

You then get 86.4

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3. A magical four-sided die is rolled twice. Let S be the sum of the resultsof the two rolls. We are told that the probability t

Fed [463]

Answer:

P(S=k) = (1/35)k

8/21

Step-by-step explanation:

P(S=k) is proportional to k

P(S=k) = ck

Total probability is 1

k = 2,3.... 8

Sum of all probabilities =

2c + 3c + 4c + 5c + 6c + 7c + 8c = 1

35c = 1

c = 1/35

P(S=k) = (1/35)k, where k = 2,3,...8

P(1&1):

P(S=2) = 2/35

P(2&2):

P(S=4)/3 = (1/3)(4/35) = 4/105

Because for S=4: (1,3) (2,2) (3,1) and all are equally likely

P(3&3):

P(S=6)/3 = (1/3)(6/35) = 2/35

Because for S=6: (2,4) (3,3) (4,2)

P(4&4):

P(S=8) = 8/35

P(getting doubles = 2/35 + 4/105 + 2/35 + 8/35 = 40/105 = 8/21

6 0

4 years ago

PLEASE SOMEONE HELP ME ANSWER THIS !!!!

Mumz [18]

Step-by-step explanation:

Part A: Linear Equation.

One of the points is (0,15). This means 0,15 is the y intercept so b=15.

We can find the slope

$\frac{5 - 15}{1 - 0 } = \frac{ - 10}{1} = - 10$

So our equation is

$y = - 10x + 15$

Part B: Exponential Equation

We know that

$15 = a \times b {}^{0}$

B to the zero power is 1 so

$15 = a$

This means a =15. Now let find b.

$5 = 15 \times b {}^{1}$

$\frac{1}{3} = b$

So the equation is

$y = 15( \frac{1}{3} ) {}^{x}$

6 0

3 years ago

What set of transformations could be applied to rectangle ABCD to create A″B″C″D″?

morpeh [17]

Answer:

C) Reflected over the x-axis and rotated 90° counterclockwise

Step-by-step explanation:

7 0

3 years ago

What's equivalent to 0.46

mars1129 [50]

The answer to the question is 46%. Just move two decimal place to the right make it a percentage. To make it back to the decimal, move the decimal two places to the left.

5 0

4 years ago

Read 2 more answers

Which postulate /theorem can you use to prove the two triangles shown are congruent?

trapecia [35]

777377737666267#773727363653626728’e

6 0

3 years ago