Pick random names or survey the first 20 (or whatever #) students who enter the cafeteria. Basically just say to pick a number of random students.
Answer:
y=38 °
Step-by-step explanation:
Answer:
139
Step-by-step explanation:
He originally had 147 books and threw 8 into a pond.
147-8=139
The answer would be A 1 7/18
Answer:
Given that Elena is currently e years old and Katie is k years old. Now, nine years ago, Katie was twice as old as Elena was.
So, k - 9 = 2(e - 9)
⇒ k - 2e + 9 = 0 .............. (1)
And, in four years, Elena will be as old as Katie is now.
So, k = e + 4
⇒ k - e - 4 = 0 ............... (2)
Therefore, the equations (1) and (2) matches the conditions. (Answer)