Mathematics, 10.09.2021 19:30 dajahp

Keisha solved the following equation: 4x - 2x + 8 = 6(x + 4)

Which step has an incorrect justification?
(9th grade-Algebra 1)

Keisha solved the following equation:

4x - 2x + 8 = 6(x + 4)
Which step has an incorrect justifi

Answers: 2

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Answers

Answer from: brianfranklin17

Remark

The second one. The second step removes the brackets on the right. It uses the distributive property which puts back the common factor that was taken out of the two terms 6x and 24. Quite often the distributive property is useful when presenting a problem to be solved.

The associative property is more of an order thing and that is very useful sometimes as well what it says is that if you have three numbers a + b + c the order which you combine things does not matter.

For example 3 + 4 + 5 could be combined as 3 + 4 = 7; 7 + 5 = 12 or 3 + 5 = 8, 8 + 4 = 12.

The associative property is useful when adding fractions.

Step-by-step explanation:

Remark

For example 3 + 4 + 5 could be combined as 3 + 4 = 7; 7 + 5 = 12 or 3 + 5 = 8, 8 + 4 = 12.

The associative property is useful when adding fractions.

Answer from: Senica

Step-by-step explanation:

Answer from: Quest

111

step-by-step explanation:

Answer from: Quest

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

$x^2-2x+y^2-6y=26$

we now create space between the x and y terms with parenthesis.

$(x^2-2x)+(y^2-6y)=26$

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

$\frac{-2}{2} =(-1)^{2} =1$

$\frac{-6}{2} =(-3)^{2} =9$

we add the squares to both sides.

$(x^2-2x+1)+(y^2-6y+9)=26+1+9$

simplify.

$(x^2-2x+1)+(y^2-6y+9)=36$

and write the quadratics in factored form.

$(x-1)^{2} +(y-3)^{2} =36$

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.

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Keisha solved the following equation: 4x - 2x + 8 = 6(x + 4)

Which step has an incorr...

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