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1 year ago

Breoz

Mathematics

1 answer:

Viktor [21]1 year ago

6 0

The second statement is:

B: a + b = b + a

Which is the commutative property, so we know that this statement is true.

<h3>Which statement is always true?</h3>

Remember that for integer numbers, we have the following properties:

Commutative property: A + B = B + A
Associative property: (A + B) + C = A + (B + C)

Now, in this case we know that a and b are integer numbers, first we can see that the second statement is:

B: a + b = b + a

Which is the commutative property, so we know that this statement is true.

The other 3 statements are false. You can see it by evaluating a = 0 and b = 1.

If you want to learn more about addition:

brainly.com/question/25421984

#SPJ1

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Step-by-step explanation:

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Read 2 more answers

If f(x) = x^2 - 4(x) + 6, find x if f(x) = 27

Elena L [17]

Answer:

x = - 3 or x = 7

Step-by-step explanation:

Given

f(x) = x² - 4x + 6

If f(x) = 27, then equating gives

x² - 4x + 6 = 27 ( subtract 27 from both sides )

x² - 4x - 21 = 0 ← in standard form

Consider the factors of the constant term ( - 21) which sum to give the coefficient of the x- term ( - 4)

The factors are - 7 and + 3, since

- 7 × 3 = - 21 and - 7 + 3 = - 4, hence

(x - 7)(x + 3) = 0

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x - 7 = 0 ⇒ x = 7

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