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ratelena [41]
3 years ago
11

Select all numbers that are integers. Look back at your notes if you forgot the definition of an integer!

Mathematics
1 answer:
IrinaK [193]3 years ago
8 0

Answer:

You forgot to attach a image

Step-by-step explanation:

An integer is any whole number (i think)

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Solve the equation. 2t +8= -10 solve for t<br>​
Vesnalui [34]

Answer:

t= -9

Step-by-step explanation:

5 0
3 years ago
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What is the slope of the line through (-7,-8)(−7,−8)left parenthesis, minus, 7, comma, minus, 8, right parenthesis and (0,4)(0,4
ANEK [815]

Answer:

12/7

Step-by-step explanation:

When given two points, we can find the slope by using

m = (y2-y1)/(x2-x1)

   = (4 - -8)/ (0 - -7)

    = (4+8) / (0+7)

   = 12/7

5 0
3 years ago
A. What is the probability that this couple spends 45 dollars or more?
guapka [62]

Using the probability table, it is found that:

  • a) There is a 0.25 = 25% probability that this couple spends 45 dollars or more.  
  • b) The expected amount the couple actually has to pay is $36.85.

Item a:

To find the probabilities involving the total cost, we have to <u>add the variables X and Y</u> from the table, then:

P(X = 30) = P(X = 15|Y = 15) = 0.2

P(X = 35) = P(X = 15|Y = 20) + P(X = 20|Y = 15) = 0.15 + 0.15 = 0.3

P(X = 40) = P(X = 15|Y = 25) + P(X = 20|Y = 20) + P(X = 25|Y = 15) = 0.05 + 0.15 + 0.05 = 0.25

P(X = 45) = P(X = 20|Y = 25) + P(X = 25|Y = 20) = 0.1 + 0.1 = 0.2

P(X = 50) = P(X = 25|Y = 25) = 0.05

The probability involving <u>values of 45 or more</u> is:

P(X \geq 45) = P(X = 45) + P(X = 50) = 0.2 + 0.05 = 0.25

0.25 = 25% probability that this couple spends 45 dollars or more.

Item b:

For a <em>discrete distribution</em>, the expected value is the <u>sum of each outcome multiplied by it's respective probability</u>, hence, involving the 10% discount for prices above $45:

E(X) = 0.2(30) + 0.3(35) + 0.25(40) + 0.9[0.2(45) + 0.05(50)] = 36.85

The expected amount the couple actually has to pay is $36.85

A similar problem is given at brainly.com/question/25782059

8 0
2 years ago
The lion population in a certain reserve drops by 5% every year. Currently, the population's size is 200. Write a function that
VLD [36.1K]

Answer:

  P(t) = 200·0.95^t

Step-by-step explanation:

Each year, the population drops to 95% of its previous value. That is, the population is multiplied by 0.95 each year. Repeated multiplication is signified by an exponent. Here, that exponent is the number of years from today (t).

The population function can be written as ...

  P(t) = 200·0.95^t

6 0
4 years ago
Andrew is planning to save allowance money for 20 years. In year one he saves $100, in year
Brilliant_brown [7]

Answer:

$500

Step-by-step explanation:

5 0
4 years ago
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