Step-by-step Answer:
To prove
Triangle ADC is congruent to triangle BDC
AC=BC (given)
DC=DC (common)
AD=BD (given CD bisects AB)
Therefore triangle ACD is congruent to BDC (justification: SSS)
10 x 10 = 100
20 + 20 + 20 + 20 +20 = 100
4 x 25 = 100
Answer:
the simplified expression is: 6y-7x
Step-by-step explanation:
-y+7y= 6y
-7x
= 6y-7x
