What is the value of x in the figure?

(15x)
15°
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Which of the following is true for the relation f(x)=2x^2+1

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost

Adriana had a garden where he measured the height of a corn plant. what. on the first day,it was 145 cm tall.after 2 weeks is grew by 23 cm.what is the height of the corn plant