Answer:
S = 9.9
Step-by-step explanation:
First, multiply by -3 to remove fractions:
so:
S - 38.4 = -28.5
Take all values to one side by adding 38.4 to both sides
S = 9.9
10.5 ounces because you’d get 3.2 ounces per dollar where as the 7.5 you’d get 3 ounces
Answer:
22
Step-by-step explanation:
The length of the fencing is 500 foot
That means the perimeter of the playground = 500
Assume that the dimensions of it are x and y
So 2x + 2y = 500 ---- perimeter of the rectangular yard
Divide both sides by 2
x + y = 250
Now subtract the two sides by x to find y in terms of x
x - x + y = 250 - x
y = 250 - x --------(1)
Since we need to find the maximum area, let us find the area in terms of x and y
Area of the yard is A
A = xy -------- area the rectangle
Now substitute y by (1)
A= x(250 - x)
A = 250x - x^2
For the maximum area, we will differentiate A with respect to x
For maximum area equate dA/dx by zero
Since dA/dx = 0
250 - 2x = 0
Add 2x for both sides
250 - 2x + 2x = 0 + 2x
250 = 2x
Divide both sides by 2
125 = x
The coordinates must be (4, 7), bc if you look at the graph closely, all you need is one more coordinate at the top to make a square.