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:
Quadrilateral
Step-by-step explanation:
Answer:
Step-by-step explanation:
Area of a square tile = 90 square inches
Let the side length of tile be "L"
<u>Condition:</u>
Area = 90
L * L = 90
L² = 90
Taking sqrt on both sides
L = √90
L = 3√10
Hope this helped!
<h3>~AH1807</h3>
Answer: 28
Step-by-step explanation:
Answer:
x = 1
Step-by-step explanation:
x + 3x - 4 = 0
- x + 3x = 0 + 4
- 4x = 4
- x = 4/4
- x = 1