1.0.583333333332. 0.043.1
No, she is not. 4/10 is 0.40 or 0.4, not 0.45.
3 out of 12 areas are filled. so that is 25% and 0.25 in decimal form. <span />
7. She is not correct. The simplification of this expression is 22a-32.
8. She is correct. The simplification of this expression is 4a-10.
The last one is tricky because I honestly do not know how to do it but you can google It.
I hope that it helped some though
No BC the x value repeats