Answer:
BC = 96
Step-by-step explanation:
Since AD is an altitude, then ∠ ADC = 90° , thus
4x + 10 = 90 ( subtract 10 from both sides )
4x = 80 ( divide both sides by 4 )
x = 20
Thus
BC = BD + DC
= 2x + 3x - 4
= 5x - 4
= 5(20) - 4 = 100 - 4 = 96
88+ 92+ 82+ 94 + x
———————————— = 90
5
x= 5th test
7² + 10² = c² where c = hypotenuse
49 + 100 = c²
149 = c²
c = √149 feet
Answer:
The best rational approximation for the square root of 55 is 7.5.
Let me know if this helps!
