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3 years ago

Describe the error in the work shown below.

Mathematics

2 answers:

ira [324]3 years ago

8 0

Answer: The product of 6 and 10 is 60, so the expressions are not equivalent. The expression should be 6(3 + 5).

Step-by-step explanation: The GCF of 18 and 30 is 6.

The product of 6 and 5 is 30.

The product of 6 and 10 is 60.

The expressions do not have the same value.

The other factor should be (3 + 5).

hope it helps :) Can u mark me brainliest

diamong [38]3 years ago

3 0

Answer: The product of 6 and 10 is 60,

Step-by-step explanation: The expressions are not equivalent. The expression should be 6(3 + 5).

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Complete the work to find the dimensions of the rectangle. x(x – 3) = 10 x2 – 3x = 10 x2 – 3x – 10 = 10 – 10 (x + 2)(x – 5) = 0

Norma-Jean [14]

Answer:

$Length =5$

$Width = 2$

Step-by-step explanation:

Given

$Length =x$

$Width = x -3$

$Area = 10$

$x(x-3) =10$

See comment for missing part of the question

Required

Complete the expression to determine the dimension of a rectangle

We have:

$x(x-3) =10$

Open bracket

$x^2 -3x = 10$

Equate to 0

$x^2 -3x - 10 =0$

Expand

$x^2 + 2x - 5x - 10 = 0$

Factorize

$x(x + 2) - 5(x + 2) = 0$

Factor out x + 2

$(x - 5)(x + 2) = 0$

Solve for x

$x - 5 = 0$ or $x + 2 = 0$

$x = 5$ or $x = -2$

The value of x cannot be negative

So:

$x = 5$

Recall that:

$Length = x$

$Width = x - 3$

So:

$Length =5$

$Width = 2$ ---- i.e. 5 - 3

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|2x+5|-4=16 find both answers

attashe74 [19]

Answer:

x=7.5 and x=-12.5

Step-by-step explanation:

|2x+5|-4=16

|2x+5|=20

2x+5=20

2x=15

x=7.5

2x+5=-20

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4 years ago