Answer: -1
Step-by-step explanation:
First change tan(315) to:
Then evaluate the sine and cosine function. What is the y component of 315 degrees? What is the x component of 315 degrees?
Answer:
NO SOLUTION
Step-by-step explanation:
Let's actually solve the system
x-4y=1
5x-20y=4
Let's eliminate y. To do this, multiply the first equation by -5, obtaining
-5x + 20y = -5
Now add this result to the second equation:
-5x + 20y = -5
5x - 20y = 4
--------------------
0 = -1
This result is never true. Thus, this system of linear equations has NO SOLUTION.
The last one
x + y = 25 is the number of pieces of fruit they will buy, where x is apples and y is oranges.
0.50x + 0.25y = 10 applies the cost, in cents, to each piece of fruit. The 10 is 10.00, keeping everything to the same number of decimal places.
Your answer would be 5.10... Hope this helps :)