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ddd [48]
3 years ago
15

3) Which property is used in the following: 4 x (5 + 7) = 4 x 5 + 4x7

Mathematics
1 answer:
earnstyle [38]3 years ago
3 0

Answer:

3) D

4) B

5) A

6) 2 (x + 7)

Step-by-step explanation:

3)  

D. Distributive Property

The distributive property of multiplication over addition can be used when you multiply a number by a sum.

4)

B. 2 + 8 = 8 + 2

The word "commutative" comes from "commute" or "move around", so the Commutative Property is the one that refers to moving stuff around.

5)

A. 4 x 1 = 4

The "Multiplicative Identity" is 1, because multiplying a number by 1 leaves it unchanged: a × 1 = 1 × a = a.

6)

3 ( x + 3) - X + 5

3x + 9 - x + 5

2x + 14

2 (x + 7)

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if you flip a coin 10 times, what is the best prediction​ possible for the number of times it will land on heads?
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Proabably. 5 because if there is 2 sides on a coin then you should divide 10÷2 which is 5.
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What can you do to get the x alone on the left side of the equation? Fill in the blanks below to show what you would do. Then, s
Phantasy [73]

Answer:

Step-by-step explanation:

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7 0
2 years ago
An error has been made in subtracting the two polynomials shown in the work below the problem is (6x^2-4x-5)-(3x^2-7x=2)
MissTica

Answer/Step-by-step explanation:

Let's work out the subtraction of the polynomial to find out where the error is and the correct result we should have.

6x² - 4x - 5

- 3x² - 7x + 2

= [6x² - 3x²] [-4x -(-7x)] [-5 -(+2)]

= 3x² + 3x - 7

The error that was made in the subtraction given in the question was that the negative signs before the terms, 7x and 5 were ignored while subtracting.

The sign is very important, it defines the value of the term.

We can choose to solve the problem in another way shown below:

(6x² - 4x - 5) - (3x² - 7x + 2)

Distributive the negative sign in the second polynomial

6x² - 4x - 5 - 3x² + 7x - 2

Combine like terms

6x² - 3x² - 4x + 7x - 5 - 2

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7 0
3 years ago
What are the zeroes of f(x) = x2 − 6x + 8? (4 points) x = −4, 2 x = −4, −2 x = 4, 2 x = 4, −2
babymother [125]

Hey there! :)

Answer:

Third option. x = 2, and x = 4.

Step-by-step explanation:

Find the zeros of this quadratic equation by factoring:

f(x) = x² - 6x + 8

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f(x) = (x - 4)(x - 2)

Set each factor equal to 0 to solve for the roots;

x - 4 = 0

x = 4

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x = 2

Therefore, the zeros of this equation are at x = 2, and x = 4.

8 0
4 years ago
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The number is odd.
77julia77 [94]

Answer:

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Step-by-step explanation:

Is this for a class??

7 0
3 years ago
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