All categories

4 years ago

Jonathan's class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class?

Mathematics

2 answers:

natulia [17]4 years ago

7 0

45 are girls. do you need an explanation? :)

Andrew [12]4 years ago

3 0

40% of the class is boys and 60% is girls.

1/2 of the number of boys is 15.

So 20% of the class is 15 boys.

But we need to find 60% of the class. So we multiply that 20% by three.

There are 45 girls and 30 boys.

You might be interested in

Which statements about experimental probability are true? Select three options.

Paladinen [302]

Answer:

I don't know this exactly, but I'll give it my best go!

We can get the answer by answering questions we know are true and eliminating the ones we don't.

E: Experimental probability can be written in the form of a ratio.

- Any probability can be expressed by a ratio so this is true.

B: Experimental probability is the same as theoretical probability.

- They are two different 'types' of probability so this is most likely false.

A: Experimental probability has the total number of trials in the numerator and the number of times an event occurs in the denominator.

- I'm fairly certain that applies to theoretical probability, not experimental.

So that means the answers are most likely C, D, and E. If I was wrong let me know!

6 0

4 years ago

Find the distance between (2,3) and (-4,9). If you get a radical (square

9966 [12]

Answer:

Length is 6√2 units or 8.49 units

Step-by-step explanation:

Length formular:

$length = \sqrt{ {(x _{2} - x_{1}) }^{2} + {(y_{2} - y_{1})}^{2} }$

x1 is 2

x2 is -4

y1 is 3

y2 is 9

$length = \sqrt{ {( - 4 - 2)}^{2} + {(9 - 3)}^{2} } \\ \\ = \sqrt{ {( - 6)}^{2} + {6}^{2} } \\ \\ = \sqrt{36 + 36} \\ = \sqrt{2 \times 36} \\ = \sqrt{2} \times \sqrt{36} \\ { \boxed{ \boxed{= 6 \sqrt{2} }}} \\ = 8.49 \: units$

8 0

3 years ago

Help Please. Adam buys 3 notebooks that each cost the same amount and 1 calculator that costs $129.99. The total cost is $147.93

Viefleur [7K]

Answer:

5.66

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

There are 5 blue marbles, 4 red marbles, and 3 yellow marbles in a box. If Jim randomly selects a marble from the box, what is t

Dahasolnce [82]

Answer:

The probabilty of selecting a red or yellow marble is 7/12

Step-by-step explanation:

To know the probability we have to divide the number of favorable events by the number of possible events

F = Favorable events: red or yellow marble

P = Possible events: red, yellow or blue

F = 4 + 3

F = 7

P = 5 + 4 +3

P = 12

7/12

The probabilty of selecting a red or yellow marble is 7/12

7 0

3 years ago

Which statement is true? pls help me ! * ill give you BRAINLIST , have to get it right *

Nitella [24]

Answer:

The y intercept of Function A is greater than the y intercept of Function B.

Step-by-step explanation:

-3 is greater than -4.

7 0

4 years ago