Answer:
Ralph's current age is 18.
Step-by-step explanation:
Let r and s represent the current ages of Ralph and Sara respectively. Our task here is to determine r, Ralph's age now.
If Ralph is 3 times as old as Sara now, then r = 3s.
Six years from now, Ralph's age will be r + 6 and Sara's will be s + 6. Ralph will be only twice as old as Sara will be then. This can be represented algebraically as
r + 6 = 2(s + 6).
We now have the following system of linear equations to solve:
r + 6 = 2s + 12, or r - 2s = 6, and r = 3s (found earlier, see above).
r - 2s = 6
r = 3s
Substituting 3s for r in r - 2s = 6, we get 3s = 2s + 6, or s = 6. Sara is 6 years old now, meaning that Ralph is 3(6 years), or 18 years old.
Ralph's current age is 18.
Answer:
The answer is D
Step-by-step explanation:
first you have to find the same denominator
the denominator will be 30 because 5×6=30 same with 6×5=30
and whatever you do to the bottom you do to the top so 4×6=24 and 7×5= 35
so its 35/30- 24/30= 11/30 so 7/6-4/5=35/30-24/30 is 11/30=11/30 which is correct.
Answer:
The sales tax is 6.5% of the selling price of the book: 0.065($90.00) = $5.85.
Step-by-step explanation:
If you are trying to find the y intercept then you have already found it, it is 4. From that point you would then draw the rest of the slope.
Instead of drawing from (0,0) you would go up 4 units and then do rise over run (7/3) to plot your line.