Question

Solve for x : If ∠ ABC = ( 5x + 36) degree and ∠ AC B = 9x



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Answer 1

Answer:

9°

Step-by-step explanation:

since AB=AC

angle ABC=angleACB

(5x+36)=9x

4x=36

x=9°

Answer 2

Answer:

:⟹eccentricityofanellipse:⟹b2=a2(1−e2):⟹16=25(1−e2):⟹16=25−25e2:⟹9=25e2

\begin{gathered}\sf : \implies \: e \: = \sqrt{ \dfrac{9}{25} } = \dfrac{3}{5} \\ \\ \sf : \implies \: eccentricity \: = \frac{3}{5} \\ \\ \sf : \implies \: foci \: of \: an \: ellipse \: = (ae,0) \: \: and \: \: ( - ae,0) \\ \\ \sf : \implies \: (5 \times \frac{3}{5} ,0) \: \: and \: \: ( - 5 \times \frac{3}{5} ,0) \\ \\ \sf : \implies \: (3,0) \: \: and \: ( - 3,0)\end{gathered}:⟹e=259=53:⟹eccentricity=53:⟹fociofan