<h2><u>
Answer:</u></h2>
1- Length of PQ: 233
2-Area of rectangle: 21840
3- Length of RS: 241.87
4-Area of triangle: 12600
<h2><u>Explanation-</u></h2>
to find the lengths of RS and PQ use the pythagorean theorem 
to find area of triangle use 
(area = base times height divided by 2)
to find area of rectangle use
(area= length times width
This looks like a parabola so:
y=x^2 - 20x + 15 --> x^2 - 20x +15=y
(x^2 -20x)=y - 15 --> (x - 10)^2=y - 15 +100 ( used complete the square)
(x - 10)^2=y + 85
(7x-10) - (-6x-8)
distribute the negative to the (-6x-8)
(7x-10) + 6x+8
disregard the parenthesis because addition is associative
7x-10 + 6x+8
combine like terms
13x-2
13x-2 is the answer
The answer could be (7+k)÷2
Answer: Hi Hope This Helps :D
Step-by-step explanation:
We have to calculate the annual interest rate for the account. Formula for the simple interest is : I = P * r * t, where P is the investment, r is the annual interest rate and t is time in years. In this case: 1,800 = 10,000 * r * 4; 1,800 = 40,000 * r; r = 1,800 : 40,000; r = 0.045, or 4.5 %. Answer: The annual interest rate is 4.5 %
