Answer:
BC with the arrow going towards the right
Answer:

Step-by-step explanation:
Notice that Angle A is being bisected.
Hence, we can use the Angle Bisector Theorem to write the following proportion:

Solve for x. Cross-multiply:

Distribute:

Subtract 14x from both sides:

Add 50 to both sides:

Divide both sides by 6. Hence, the value of x is:

X²+10x+21=0
/\ = 10²-4*1*21
/\ = 100 - 84
/\ = 16
x = (-10+/-\/16)/2
x = (-10+/-4)/2
x' = (-10+4)/2 = -6/2 = -3
x" = (-10-4)/2 = -14/2 = -7
S: {-3; -7}
Answer:
y=55
x=70
Step-by-step explanation: