If AB=2x-5 and BC=x+1, then find AB. pls help?

pls help!





If AB=2x-5 and BC=x+1, then find AB.


a.2


b.4


c.6


d.7





If BA=13, BC=2x-3 and AD=5, then find BC.


a.6.5


b.8


c.10


d.13





A man 5 feet 9 inches (5.75 ft) tall casts a shadow 14 feet in length. A nearby building casts a shadow that is 50 feet. How tall is the building?





a.1.61 ft


b.20.5 ft


c.38 ft


d.121.7 ft

If AB=2x-5 and BC=x+1, then find AB. pls help?
bbc


or


bbb?
Reply:Hi,





If AB=2x-5 and BC=x+1, then find AB.





** If B is the midpoint of AC, then AB - BC, so:


2x - 5 = x + 1


x - 5 = 1


x = 6


But this didn't ask for x, it asked for AB.


If x = 6 and AB = 2x - 5, then AB = 2(6) - 5 = 7


This is answer D.





a.2


b.4


c.6


d.7 %26lt;== ANSWER





If BA=13, BC=2x-3 and AD=5, then find BC.





With no picture and 4 letters, A,B,C, and D, I have no idea what you are asking here.





a.6.5


b.8


c.10


d.13





A man 5 feet 9 inches (5.75 ft) tall casts a shadow 14 feet in length. A nearby building casts a shadow that is 50 feet. How tall is the building?





height.....height


---------.=.---------


shadow..shadow





5.75.......x


-------.=.------


14..........50





Cross multiply and solve.





5.75(50) = 14x


287.5 = 14x


20.536 = x


The answer is b, 20.5 feet





a.1.61 ft


b.20.5 ft %26lt;== ANSWER


c.38 ft


d.121.7 ft





I hope those help!! :-)