1. 18 is 30% off what number 2. 10 is 25% of
3. 54 is 9% of
4. 45 is 75% of

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

We just started the introduction into circles and i have no idea how to do this.

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.