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stira [4]
3 years ago
5

What is the simplified expression for –3cd – d(2c – 4) – 4d?

Mathematics
2 answers:
bogdanovich [222]3 years ago
6 0

Answer:

-5cd

Step-by-step explanation:

-3cd - d(2c - 4) - 4d

To get simplified expression we use order of operation PEMDA

WE start with parenthesis. Distribute -d inside the parenthesis

-3cd - 2dc +4d - 4d

Now we combine like terms  that has same variables

4d-4d becomes 0

Expression becomes

-3cd - 2dc. Both terms has same variables  so we add it

-5cd

ankoles [38]3 years ago
5 0
-5cd

I don't know if this is what you asked...hope it helped!
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3 years ago
A coffee shop owner wants to examine the number of customers who pass in front of his store in the morning from 7:00am to 7:30am
adelina 88 [10]

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In the question, we are given that a coffee shop owner wants to examine the number of customers who pass in front of his store in the morning from 7:00 A.M to 7:30 A.M.

We are asked to find the probability that more than 210 people will pass in front of his store if the mean number of customers during this time is 210.

This experiment follows a Poisson Distribution with a mean (λ) = 200, and the random variable X = 210.

To find the probability that more than 210 people will pass in front of his store, we will find P(X > 200).

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The value of poissoncdf(200,210) = 0.77271.

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2 years ago
Solve the following pair of simultaneous equation using elimination method.
sp2606 [1]

Answer:

x = 1 and y = −2

Step-by-step explanation:

Rewrite equations:

x + 2y = −3

3x − 2y = 7

Step 1: Solve x+2y=−3 for x:

x + 2y = −3

x + 2y + −2y = −3 + −2y (Add -2y to both sides)

x = −2y − 3

Step 2: Substitute −2y − 3 for x in 3x − 2y = 7:

3x − 2y = 7

3(−2y − 3) − 2y = 7

−8y − 9 = 7 (Simplify both sides of the equation)

−8y − 9 + 9 = 7 + 9 (Add 9 to both sides)

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y = −2

Step 3: Substitute −2 for y in x = −2y − 3:

x = −2y − 3

x = (−2)(−2) − 3

x = 1 (Simplify both sides of the equation)

3 0
3 years ago
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