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Murljashka [212]
2 years ago
9

Given the picture, what is the length of AC? A) 4.5 B) 5 C) 7.5 D) 8

Mathematics
1 answer:
drek231 [11]2 years ago
7 0

we know that

triangles BCD and ACE are similar

so, their ratios of sides must be equal

Calculation of y:

\frac{BC}{AC}=\frac{CD}{CE}

we can see that

AC=AB+BC

AC=y+3

CE=CD+DE

CE=4+6

CE=10

now, we can plug values

\frac{3}{y+3}=\frac{4}{10}

now, we can solve for y

3*10=4*(y+3)

30=4y+12

30-12=4y+12-12

18=4y

y=4.5

Calculation of AC:

we know that

AC=y+3

we can plug y

and we get

AC=4.5+3

AC=7.5...................Answer


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