Hello! For this question, you solve using order of operations, which you probably already have remembered as PEMDAS. Anytime a number is raised to the 0 power, that is equivalent to 1. 0.5^0 is 1. 250 * 1 is 250. x = 0 gives us the answer of 250. Now, let's solve for the number by the second power. 0.5² is 0.25. 250 * 0.25 is 62.5. x² gives us 62.5. Now, let's subtract the two numbers together. 250 - 62.5 is 187.5. Because the number is decreasing, the slope is negative, so the answer is -187.5. Your answer is correct.
Answer:
x=-1, y=8
Step-by-step explanation:
The given system is
-x+y =7
6x+y=14
We make y the subject in the first equation to get:
y=x+7
We put y=x+7 into 6x+y=14 to obtain
![6x + x + 7 = 14](https://tex.z-dn.net/?f=6x%20%2B%20x%20%2B%207%20%3D%2014)
6x+x=14-7
7x=7
x=1
We now put x=1 into y=x+7
![y = 1+ 7 = 8](https://tex.z-dn.net/?f=y%20%3D%20%201%2B%207%20%3D%208)
The solution is x=1, y=8
Part B
We now verify
-1+8=7 ....True
6(1)+8=14....True
Yes it does mean the whole fraction is negative