Answer:
x=8/9
Step-by-step explanation:
5x+2(x-3)=-2(x-1)
5x+2x-6=-2x+2
7x-(-2x)-6=2
7x+2x=2+6
9x=8
x=8/9
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:
Line A, (horizontal slope), Line B, (Negative slope) Line C, (Vertical slope) Line D, (Undefined slope)
Step-by-step explanation:
Answer:
125.66
Step-by-step explanation:
C = 2πr = 2·π·20 = 125.66371
Answer:
18x
Step-by-step explanation:
j=18
k=x
18xor18
I do not understand this question