They are similar triangles so 20/4=15/x
solve for x
20x=15*4=60
x=3
Answer:
and 
Step-by-step explanation:
The first system is
and 
We substitute x=-3 and y=-3
and 
Both equations are not satisfied
The next system is
and 
We substitute x=-3 and y=-3
and 
Both equations are satisfied
The next system is
and 
We substitute x=-3 and y=-3
and 
Both equations are not satisfied
The next system is
and 
We substitute x=-3 and y=-3
and 
Both equations are not satisfied
10-
15 + 15 = 30
11 + 11 = 22
30 + 22 = 52
52 + 9 = 61
11-
11 + 10 + 16 = 37
Answer: the last one
Step-by-step explanation: because 7 times 24 equals 168 and x would be 21 so 21 times 8 equals 168.
Answer:
8 1/8
Step-by-step explanation:
~~~~~~~~~~~~~~~~~