Answer: 30.048
Try a calculator, it can help a lot!
Answer: $8.5
Step-by-step explanation:
i did the work
Answer:
n ≥ -3
Step-by-step explanation:
If n can be <em>no less than</em> -3... then we know that n has to be bigger than or equal to -3.
This could also be said as <em>greater than or equal to</em> -3
Conveniently enough... there is a sign for <em>greater than or equal to</em> and it is ≥
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...
Answer:
X=30
Step-by-step explanation:
The whole polygon is 360 degrees so:
360-28-40-120-142=X, which is 30
