Question

Sat Calc section

I don't think there are questions as difficult as this one, but please help​

Answer 1

Answer: D

Step-by-step explanation:

Area of triangle =
`(1)/(2) bh`

• b = base length
• h = height

Area of ΔABC =

• 
  `(1)/(2) CE * AB`

• 
  `(1)/(2) BD * AC`

Since it's the same triangle, those two areas should equal each other:

`(1)/(2) CE*AB=(1)/(2) BD*AC\\(1)/(2) *9*8=(1)/(2) *7*AC\\(1)/(2) *72=(7)/(2) AC\\36*2=7AC\\AC=(72)/(7) =10(2)/(7)`

I hope this is correct