Answer:
-4
Step-by-step explanation:
8-5= 3
x/3= 4
12/3=4
-16+12=-4
Let the amount of shells collected by Aaron be

and the amount of shells collected by Maria be

respectively. Then the following system of equations should be solved:

First of all, express

out of first equation:

Then, replace

in second equation with found expression and solve it:



Finally, replace

in first equation with found value and solve it too:


So, Aaron has found
7 shells while Maria has found
21.
Answer:
- r = 3V/(2πh²)
- h = 3V/b²
- r = 25/π cm ≈ 7.9577 cm
- w = 15 cm
Step-by-step explanation:
1. Multiply both sides of the equation by the reciprocal of the coefficient of r.

__
2. Multiply both sides of the equation by the reciprocal of the coefficient of h.

__
3. Solve the circumference formula for r, then substitute the given information.

__
4. Solve the perimeter formula for width, the substitute the given information and do the arithmetic.

_____
In general, solving for a particular variable involves "undoing" what has been done to the variable, usually in the reverse order. In part 4, the variable W has L added and the sum is multiplied by 2. We "undo" those operations, last operation first, by dividing by 2 and subtracting L.
The properties of equality say you can do what you like to an equation as long as you do the same thing to both sides of the equation. So, when we say "divide by 2", we mean "divide both sides of the equation by 2." Likewise, "subtract L" means "subtract L from both sides of the equation."
A.63
then answer for user
if a and b has power 4 and 2 respectively the the answer will be, 51
and if not power then,
25
hope it will help you