Answer:
D
Step-by-step explanation:
We have to added up the like therms (the therms with the same literal parts)
x^2 + 2x^2 = 3x^2
3x - 4x = -x
2 + 1 = 3
3x^2 - x + 3
Let Sister's age now = s
So Larry is now s + 8
In THREE Years Sister = s + 3
Larry = {s + 8} + 3
But We are told that he will be TWICE as old as Sister is NOW!!!
So s + 11 = {2s}
Solve s = 11
So Sister is ELEVEN Years old and Larry is NINETEEN Years old.
Answer:
The answer to your question is x = 6
Step-by-step explanation:
To solve this problem use proportions. Just look for the right sides so the proportion be correct.
Sides of the small triangle = Sides of the big triangle

Solve for x

Simplification
x = 
Result
x = 6
Answer:
Volume of cone = 686π/3 or 718.67 in³
Step-by-step explanation:
Given the following data;
Radius, r = 7 in
Height, h = 14 inches
From the diagram, we can see that the object is a cone
To find the volume of a cone;
Mathematically, the volume of a cone is given by the formula;
Where;
V is the volume of the cone.
r is the radius of the base of the cone.
h is the height of the cone.
Substituting into the equation, we have;
Volume of cone = 718.67 in³ or 686π/3 in³