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3 years ago

You ride the subway about 45 times per month. should you buy the monthly pass

Mathematics

1 answer:

exis [7]3 years ago

3 0

Is it cheaper then without it? If so you should

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The sum of two numbers is "-1" One number is 12 more than the other one. Find the numbers.

ruslelena [56]

Answer:

x = 5.5

y = - 6.5

Step-by-step explanation:

Let one of the numbers = x

Let the other number = y

x + y = - 1

x = y + 12 Put the second equation into the first one

y + 12 + y = - 1 Subtract 12 from both sides

y + y = - 1 - 12 Combine both left and right sides

2y = - 13 Divide by 2

2y/2 = - 13/1

y = - 6.5

x + y = - 1

x - 6.5 = - 1 Add 6.5 to both sides

x = 5.5

7 0

2 years ago

The statement today the dollar is worth 45 cents describe

Aneli [31]

This statement is false. The dollar is worth 100 cents.

Hope this helps :)

4 0

3 years ago

1. The zoo fed the large 680 pounds of food last week. Seven large animals each ate the same amount while the elephant ate 183 p

postnew [5]

Answer:

1: 71 pounds

2: 14 jellybeans

Step-by-step explanation:

680 - 183 = 497

497 / 7 = 71

Esther had (6 times)-7

77 + 7 = 84

84 / 6 = 14

8 0

2 years ago

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 50

Volgvan

Answer:

$P(\bar X>530)=1-0.808=0.192$

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Let X the random variable that represent the scores, and for this case we know the distribution for X is given by:

$X \sim N(\mu=505,\sigma=170)$