High School

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what is the length of 2x+1

of the rectangle Sr

what is the length of 2x 1 of the rectangle Sr

Answer :

1.1) The length of fencing required for project A is 4x - 1.

1.2) The actual distance is 19m

It costs R6175.

How the actual distance is calculated.

1.1 Length of the plot is 2x + 1

Width = x - 1

For project A,

He needs wire for the fencing of SP, PQ and QR

SP = x - 1

PQ = 2x + 1

QR = x - 1

The total is 2(x-1) + 2x + 1

= 2x - 2 + 2x + 1

= 4x - 1

The length of fencing required for project A is 4x - 1.

1.2 If x = 5m

Substitute x = 5m into the expression 4x - 1 to get the actual distance.

Actual distance = 4(5) - 1 = 20 - 1

= 19 m

Given that 1m fencing costs R325

19 m will cost 19 * R325 = R6175

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Rewritten by : Barada