Make "a" the subject of the formula.
Note the equal sign, what you do to one side, you do to the other.
Isolate the a. Add 2 to both sides
T = a - 2
T (+2) = a - 2 (+2)
a = T + 2
a = T + 2 is your answer
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Do you need help with all of it?
So,
The original price was $50.
The price was increased by 20%.
If you find 20% of $50 and add the result to $50, you will get the markup price.
20% --> 0.2
50(.2) = $10
10 + 50 = 60
The marked-up price of the boat is $60.
Answer:
- 400 yards by 400 yards
- 160,000 square yards
Step-by-step explanation:
The maximum area polygon for a given perimeter is a <em>regular</em> polygon. The regular 4-sided polygon is the square. Each side length will be ...
(1600 yd)/4 = 400 yd
The area will be (400 yd)² = 160,000 yd².
The maximum area Diana can enclose is a square 400 yards on each side, for a total of 160,000 square yards.
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On dimension can be represented by x, and the other by y. The sum of the two dimensions will be half the perimeter, so we have ...
y = 800 -x
The area is then ...
A = xy = x(800 -x)
This equation describes a parabola that opens downward. It has zeros at x=0 and x=800. The vertex (maximum area) is on the line of symmetry halfway between those values, at x = 400. Then y = 800 -400 = 400, and the rectangle is a square.
I think it would be 4 I’m not sure though