Select the property that allows the statement (a + b) + c to be written as c + (a + b).

2 answers:

7 0

Commutative property allows you to change the order of an expression. Therefore, this expression is an example of commutative property.

morpeh [17]3 years ago

5 0

The associative property of addition.

It states that you can regroup a, b and c in any way and still get the same answer.

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The sum of the following algebraic expression 2x + 15, 7-8x and 3x - 41 is 30 find the value of x..

Ksju [112]

$\\ \tt \longmapsto2x + 15 + 7 - 8x + 3x - 41 = 30 \\ \\ \tt \longmapsto 2x - 8x + 3x + 15 + 7 - 41 = 30 \\ \\ \tt \longmapsto - 3x - 19 = 30 \\ \\ \tt \longmapsto 3x + 19 = - 30 \\ \\ \tt \longmapsto 3x = - 30 -19 \\ \\ \tt \longmapsto 3x = - 49 \\ \\ \tt \longmapsto x = - \frac{49}{3}$

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3 years ago

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Cost of sled $99.50 markup 95%

DIA [1.3K]

Sled $99.50 X 0.95= $94.525
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Answer is $194.03

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3 years ago

A line with a slope of -1/2 passes thru the point (-4,3)...Which equation represents this line?

BaLLatris [955]

Here you go!! Hope this helps!!!!

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3 years ago

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1) What can u do to get 2x alone on the left side?

CaHeK987 [17]

Answer:

82.5 - 82.5 + 2x = 338.5 - 82.5

2x = 256

2x ÷ 2 = 256 ÷ 2

x = 128

Step-by-step explanation:

In order to get rid 82.5, you have to substract the same value on both side to get a 0 value.

In order to find the value of x, you have to divide the value that is sticked with x which is 2. As you divide 2 by 2, you will get 1 as a single value of x so you have to divide 2 to both side too.

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3 years ago

Prove that ax+by+c=0 represent the eqn of straight line

ivann1987 [24]

If we rewrite it as y=mx+d (which can be taken from here from subtracting ax and c from both sides, then dividing b, resulting in y=(-a/b)(x)-c/b. We can then substitute -a/b for m and -c/b for d), if d=0, then we have m as a constant and as we add a specific number to y (that number being m) every time the x value increases by 1, it therefore forms a straight line. If d is not 0, then we simply add d to every single number - this is still a straight line due to that we still add a specific number to y every time x increases by 1 every single time

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3 years ago