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frez [133]
3 years ago
8

THIS IS URGENT I NEED HELP ASAP PLEASE

Mathematics
1 answer:
enyata [817]3 years ago
4 0
So you can only simplify like terms this means that number terms like 5 can’t be added or subtracted from 5x and the x is a separate term this is the same for x^2 and so on as these are different terms and can’t be added or subtracted to other terms, next the signs in between the brackets may change whether you add or subtract so be careful with those a negative and a positive make a negative, two positives make a positive, two negatives make a positive, always check the signs when answering so
No20) (2a+9)-(4a-9) would be 2a+9-4a+9 as the minus changes the signs this then equals -2a+18
Now you can do the harder ones
19) (5a^2+7a-1)+(3a^3-4a+6) =
3a^2+5a^2+3a+5
21) (3x^3+3x^2-4x+5)-(x^3-2x^2+x-4) = 2x^3+5x^2-5x+9
22) (2x^3-5x+1)+(4-6x+x^2) = 2x^3+x^2-11x+5
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Which expression represents the following statement: x is no less than 0. x>0 x≤0 x≥0 x<0
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Answer: x ≥ 0

Step-by-step explanation:

First, let's define the symbols used:

a < x              (this means that a is strictly smaller than x)

a > x              (this means that a is strictly larger than x)

a ≤ x              (this means that a is smaller than or equal to x)

a ≥ x              (this means that a is larger than or equal to x)

Now we have the statement "x is no less than 0"

Then x can be equal to zero, or larger than zero, but never smaller than zero.

Looking at the symbols above, we know that we need to use:

x ≥ 0

(this is equivalent to the statement)

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3 years ago
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Answer:

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Step-by-step explanation:

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Which of the following is a valid probability distribution? Probability distribution A is shown. The probabilities of 1, 2, 3, 4
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Considering the given probability distributions, distribution D is valid.

<h3>When a probability distribution is valid?</h3>

A probability distribution is valid if:

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In this problem, only distribution D has a sum of 1, hence it is the only valid distribution.

More can be learned about probability distributions at brainly.com/question/23670007

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