For this case, the first thing we must do is define variables.
We have then:
x: number of years of Joan y: number of years of ellen We now write the system of equations:

Solving the system we have:

So that Joan is 21 years old then:
Answer: joan will be 21 years old in 12 years
Answer:
v= -1 (BRAINLIEST PLEASE)
Step-by-step explanation:
|v+8| -5=2
Add 5 to each side
|v+8| -5=2
+5= +5
Now you have |v+8|= 7
So what plus 8 equals 7?
-1
so now you have |-1+8| which is 7
so v= -1
Question 4 is C and im not sure about the other questions
Answer:
yes
Step-by-step explanation:
4:8 and 3:6 when simplified gives the same result which is 1:2
Answer:it ends at 11:00
Step-by-step explanation:8:30+2:30=11:00