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taurus [48]
2 years ago
10

Can someone help me solve parts (a) and (c) please? Thank you!

Mathematics
2 answers:
Brilliant_brown [7]2 years ago
6 0

a) 4x +6

Add up all the sides to calculate perimeter

Nadya [2.5K]2 years ago
4 0

Answer:

a) 6x + 6

b) 15 x 24

c) see explanation

Step-by-step explanation:

a) 2x + x + 3 + 2x + x + 3 = 6x + 6

b) 6x + 6 = 78

6x = 72

x = 12

2(12) = 24

(12) + 3 = 15

15 x 24

c) 2x(x + 3) = 2x² + 6x

2(12)² + 6(12) = 288 + 72 = 360

15 x 24 is also 360

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