Answer:the answer is b
Step-by-step explanation:
i cant really explain how i know its kind of second natural to me now
The answer would be B C E hope this helps :)
I am going to explain this using the substitution method, considering it appears to be the best in this situation.
We know (from the bottom equation) that y can equal 3x+20. Using this knowledge, we substitute the y in the top equation for 3x+20. Now, we have an equation that looks like this:
3x+20=x^2+2x
Now we need to move x to one side and then do some radicals (square roots).
Subtract the 2x on the right (since it is smaller, negatives = NONONO), which will give you
x+20=x^2
Now, we take the square root of both sides to get
rad(x+20)=x
Now we have to simplify. 20 doesn't have a square root, but 4 goes into 20, and 4 has a square root of 2. This now becomes
2rad(x+5)
This doesn't simplify any further... we have a problem... no way to isolate x as far as my knowledge goes... Sorry, can't help you any further than that, but another person or your teacher might be able to. R.I.P...
At every 1.0 unit, boiling point decreases 1.8 unit, which means the slope m = -1.8.
Answer:
b
Step-by-step explanation
look at the way the way the line curves and cross over into the positive across the dotted line. the curw = y
