A. given
b. distributive property (a(b+c)=ab+ac)
c. addition or commutative property (a+b=b+a)
d. subtraction property of equality (if a=b, then a-c=b-c)
e. division property of equality (if a=b, then a/c=b/c)
f. equality property (if a=b, then b=a)
Answer:
Square: 
Vertex: (10,-68)
Step-by-step explanation:
So first you would divide 1950/6 to find the amount for one year of their age.
Then you would multiply that by the ages, which should get you 4 numbers, then you all those numbers together. Try 9750.
Y2-3x+3 sorry if I’m wrong
Answer:
The value of given expression is 22.5.
Step-by-step explanation:
The given expression is

Where, c=6 and d=7.
Substitute c=6 and d=7 in the given expression.





Therefore the value of given expression is 22.5.