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3 years ago

2/5 of a class are girls. 3/4 of the boys are called Paul. What fraction of the whole class is not called Paul?

Mathematics

2 answers:

Novay_Z [31]3 years ago

7 0

Answer:

1/4

Step-by-step explanation:

3/4 + 1/4 = 4/4

irina [24]3 years ago

6 0

Answer:

3/20

Step-by-step explanation:

If 2/5 are girls then to find boys, calculate

1(the whole class) - 2/5 which is 3/5.

Then if 3/4 of the boys are called Paul, that means the remaining 1/4 aren't.

1/4 × 3/5 = 3/20

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3 years ago

UCF is a major Metropolitan University located in Orlando Florida. UCF is advertising their bachelor in Economics with the stati

Arlecino [84]

Answer:

The claim is rejected

Step-by-step explanation:

Claim: UCF is advertising their bachelor in Economics with the statistic that the starting salary of a graduate with a bachelor in economics is $ 48,500 according to Payscale (2013-13).

Null hypothesis: $H_0: \mu = 48500$

Alternate hypothesis : $H_a : \mu \neq 48500$

n = 50

Since n is more than 30 .

So we will use Z test

x=43350

Standard deviation = 15000

$Z=\frac{x-\mu}{\frac{s}{\sqrt{n}}}\\Z=\frac{43350-48500}{\frac{15000}{\sqrt{50}}}\\Z=-2.42$

Refer the z table

p value = 0.00776

$\alpha = 0.01$

p value < $\alpha$

So, We are failed to accept null hypothesis

Hence The claim is rejected

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3 years ago

In an election, about 500,000 people voted in all. What could be the exact number of people who voted in the election?

elixir [45]

I am going to give a few answers:

497,543
504,690
501,991
496,900

6 0

3 years ago

A line goes through the point (6,-2) and has a slope of

Lilit [14]

Answer: a = 3

Step-by-step explanation: when you multiply 6 by -3 you get -18 and if you add 16 you get -2

so the slope is -3 and the y-intercept is 16

so a*-3 + 16 = 7

by subtracting 16 on both sides you get

-3a = -9

and to get a by itself you divide -3 on both sides

a = -9/-3

a= 9/3

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5 0

3 years ago

How can I solve this problem?

irina [24]

5x + 5x +3x (like terms)
13x-60=180
180+60=240
240/13=18.4615
X=18.4615

I hope this is correct.
(There are so many different ways to do math problems like this) I hope I could help... sorry if I didn’t.

6 0

3 years ago