Question

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Answer 1

Answer:

4. 2(x+4) = 12

2×x + 2× 4 = 12

2x + 8 = 12

2x = 12 - 8

2x = 4

x = 4/2

x = 2

Step-by-step explanation:

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Answer 2

Answer:

2. Length = 40cm

Diagonal = 41cm

Using the formulas

P= 2(l+w)

$d = \sqrt{ {w }^{2} + {l}^{2} } \\ solving \: for \: p \\ p = 2l + 2 \sqrt{ {d}^{2} - {l}^{2} } \\ = 2.40 + 2. \sqrt{ {41}^{2} - {40}^{2} } \\ = 98cm$