Answer:
y=7
Step-by-step explanation:
Since they are all congruent angles this means that the sides are equal too.
Answer:
7.5 seconds
Step-by-step explanation:

Thus, the time required for the object to return to its point of departure is 7.5 seconds.
Answer:
x=-12,y=3
Step-by-step explanation:
1/2x+6y=12
y=x+15
since y=x+15
substitute y in first equation, we have
1/2x+6(x+15)=12
open the bracket
1/2x+6x+90=12
1/2x+6x=12-90
x/2+6x= -78
13x/2=-78
13x=2×-78
x=-12
Now x=-12, put x=-12 in the second equation, we have
y=x+15
y=-12+15
y=3
hope it helps
The correct answer is 5 1/2 because if it weren’t simplified it would be 6/2 which makes the numerator the greatest.