ABC is a straight line.
The length of AB is four times the length of BC.
AC = 75 cm.
Work out the length of AB.

Step-by-step explanation:

What is knownAC=75      AB=4 times BC   AB+BC=AC

4(BC)+BC=75        Add like numbers

4(BC)+BC=5BC

5(BC)=75       get the variable(BC) alone by dividing both sides by the number(5)

5(BC)/5=75/5  Then simplify5(BC)/5=(BC)  and 75/7=15

(BC)=15

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

57.09 minus 7.0435 equals

step-by-step explanation:

just subtrach them both and u get the answer of 50.0465