Answer:
C. 2x + 5
Step-by-step explanation:
Kelly: x
Tim: 2 × x = 2x
Jim: 2x + 5
hope it helps :)
AB=6cm AC=12cm
AC² = AB + BC²
12² = 6² + CB²
CB² = 12² - 6²
CB² = 144 - 36
CB² = 108
CB = √ 108 cm.
sin 55° = CB / CD
0.81915 = √108 / CD
CD = 10.392 / 0.81915
CD = 12.686 cm
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