There is an app that will help for these types of questions called, "Showmath."
Assuming, it's decimal logarithm.
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X=Marks sister's age
x+11= Marks age
x+11 +8 = 2x+8
x+19=2x +8
x+19-x=2x-x +8
19-8=x+8-8
11=x Marks sisters age in 8 years
11-8= 3 Marks sisters age now
x+11=22 Marks age in 8 years
22-8= 14 Marks age now
Answer:
r = -6
Step-by-step explanation:
Equation of a line:
The equation of a line has the following format:
In which m is the slope and b is the y-intercept.
Slope 3/4
This means that 
, and thus:
(6,3)
This means that when 
. We use this to find b. So
So
(-6, r)
r is y when 
. So
So r = -6.
Answer:
The answer is b
Step-by-step explanation:
