Cos^2x - 2cosxcosx + sin^2x = 1 - 2sin x cosx
So cos^2x + sin^2x = 1
Answer:
$34
Step-by-step explanation:
Problem
You deposit $850 into a bank account paying 4% simple interest per 6 months. You left the money in for 6 months. How much interest do you get at the end of those 6 months?
Result
The interest is $34.
(6-4) + 2) x 8
6-4 = 2
2+2=4
4 x 8 = 32
or
(8 x 2 ) x (6-4) = 32
or
2(6 + 8) + 4 = 32
and many more
Given that a <span>store is selling two mixtures of nuts in 20-ounce bags: peanuts and cashews.
Let the cost of one ounce of peanut be x and the cost of one ounce of cashew be y, then
Given that </span>t<span>he first mixture has 15 ounces of peanuts combined with five ounces of cashews, and costs $4.25 implies that 15x + 5y = 4.25
Also, given that </span>t<span>he second mixture has five ounces of peanuts and 15 ounces of cashews, and costs $6.75 mplies that 5x + 15y = 6.75
To obtain the cost of </span><span>one ounce of peanuts and one ounce of cashews, we solve the two equations above, simultaneously:
Therefore, </span><span>
one ounce of peanuts and one ounce of cashews cost $0.15 and $0.40 respectively.</span>