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krok68 [10]
2 years ago
6

Please help with the answer what does cd=??

Mathematics
1 answer:
Furkat [3]2 years ago
5 0

Answer:

<h2><u><em>CD = 18</em></u></h2>

Step-by-step explanation:

find the semiperiter (1/2 perimeter or L+W)

80 : 2 = 40

now we know that 4z + 2 + 3z + 3 = 40

we solve for z with an equation

4z + 2 + 3z + 3 = 40

7z = 40 - 2 - 3

7z = 35

z = 35 : 7

z = 5

now we find CD

3z + 3 =      (z=5)

3 * 5 + 3 =

15 + 3 =

<u><em>18</em></u>

<u><em>-------------------------------</em></u>

<u><em></em></u>

check (remember pemdas)

4z + 2 + 3z + 3 = 40

4*5+2+3*5+3 = 40

20+2+15+3=40

40 = 40

the answer is good

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