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3 years ago

Let x △ y be defined by x △ y=x−5y. What is the value of 3 △ (−4)

1 answer:

5 0

$x\Delta y=x-5y\\\\3\Delta(-4)\qquad\text{put the values x = 3 and y = -4 to the expression x - 5y}:\\\\3\Delta(-4)=3-5(-4)=3+20=23$

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What is the image of (3,9) after a dilation by a scale factor of 3 centered at the origin

Sav [38]

Answer:

(9, 27 )

Step-by-step explanation:

Since the dilatation is centred at the origin, multiply each of the coordinates of the original point by the scale factor of 3

(3, 9 ) → (3(3), 3(9)) → (9, 27 )

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3 years ago

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Hi, TRUEBOSS72!

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-ASIAX ∵<span>Frequent Answerer</span>∴

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3 years ago

Use multiplication to find 2 equivalent fractions to 3/4 and 4/5

Gre4nikov [31]

3/4 = 6/8 = 9/12
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3 years ago

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Last year, a person wrote 126 checks. Let the random variable x represent the number of checks he wrote in one day, and assume

Arisa [49]

Answer: The mean number of checks written per day $=0.3452$

Standard deviation $=0.5875$

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Step-by-step explanation:

Given : The total number of checks wrote by person in a year = 126

Assume that the year is not a leap year.

Then 1 year = 365 days

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Then , the mean number of checks wrote by person each days id=s given by :-

$\lambda=\dfrac{126}{365}\approx0.3452$

Since , the distribution is Poisson distribution , then the variance must equal to the mean value i.e. $\sigma^2=\lambda=0.3452$

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3 years ago

Explain how 9*4 can help you find 9*8

statuscvo [17]

It can help because 9×4 =36, and 9×8=72. if you divide 72 by 2 you get 36 which is the answer to 9 ×4. basically because nine is the same in both problems you are multiplying by 4 (and you know 4 is half of 8) you can assume that multiplying the sum of 4 and 9 that you will get the sum of 8 and 9.

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