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Kruka [31]
3 years ago
6

Which property justifies this statement? If 4x=20, then x=5. Division Property of Equality Reflexive Property of Equality Substi

tution Property of Equality Subtraction Property of Equality
Mathematics
2 answers:
Zanzabum3 years ago
8 0

Answer:

Option 1 - Division Property of Equality

Step-by-step explanation:

Given : If  4x=20, then x=5.

To find : Which property justifies this statement?

Solution :

The equation is  4x=20

To make variable separate we have to remove 4 which is in multiple of variable x.

So, We divide both side by 4,

Applying division property of equality,

We can divide both sides of an equation by the same number and preserve equality.

\frac{4x}{4}=\frac{20}{4}

x=5

Therefore, The property justifies the statement is 'Division Property of Equality'.

So, Option 1 is correct.

olasank [31]3 years ago
6 0
<span>Division Property of Equality</span>
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33 chips

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c= (700 - 464) ÷ 7 = 33

She can use 33 chips or less. I less cause she shouldn't eat too much calories.  

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A publisher reports that 54% of their readers own a particular make of car. A marketing executive wants to test the claim that t
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Answer and explanation:

Null hypothesis: p is not 54%

Alternative hypothesis : p is equal 54%

First find standard deviation

Standard deviation is:

σ = √[ P ( 1 - P ) / n ] = √[ 0.54×0.46/220 ] =0.033

The z score is calculated p-P/σ = (0.54-0.50)/0.033 = 1.2121

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3 years ago
Question 3 asappp please​
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Answer: 2. please brainliest

Step-by-step explanation:

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2 years ago
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Find the sum.<br> 2(-5y+6)+(2y-8)
kotegsom [21]

Answer: I am just hoping that this is the correct answer

Step-by-step explanation:

2(-6 + -5y) + (2y + -8) = 0

(-6 * 2 + -5y * 2) + (2y + -8) = 0

(-12 + -10y) + (2y + -8) = 0

Reorder the terms:

-12 + -10y + (-8 + 2y) = 0

Remove parenthesis around (-8 + 2y)

-12 + -10y + -8 + 2y = 0

Reorder the terms:

-12 + -8 + -10y + 2y = 0

Combine like terms: -12 + -8 = -20

-20 + -10y + 2y = 0

Combine like terms: -10y + 2y = -8y

-20 + -8y = 0

Solving

-20 + -8y = 0

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '20' to each side of the equation.

-20 + 20 + -8y = 0 + 20

Combine like terms: -20 + 20 = 0

0 + -8y = 0 + 20

-8y = 0 + 20

Combine like terms: 0 + 20 = 20

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Divide each side by '-8'.

y = -2.5

Simplifying

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4 0
3 years ago
Explain the relationship between the polynomial identities: x^2 − 1 = (x +1)(x − 1) and x^2 − a^2 =(x − a)(x +a).
Bess [88]

Answer:

So these two equation can be related by identity x^2-a^2=(x+a)(x-a)

Step-by-step explanation:

We have given equation x^2-1=(x+1)(x-1)

And x^2-a^2=(x+a)(x-a)

We know the algebraic identity a^2-b^2=(a+b)(a-b)

From this identity

x^2-1 can be written as (x+1) (x-1)

And using same identity x^2-a^2 can be written as (x-a)(x-b)

So these two equation can be related by identity x^2-a^2=(x+a)(x-a)

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3 years ago
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