Algebra 2 (check)
posted by erin .
I have some problems that I've answered and I need someone to check to see if I'm right. Im just posting the questons and my answer,if its wrong I'll post my work,so here it is bear with me please and thank you.
1)name which sets of numbers to which 28 belongs. my answer = integers,rationals,reals
2)the property illustrated by 7x(9+1)=(9+1)x7 is the. my answer = commutative property of multiplication
3)solve the equation 2/5y=3/14. my answer = 28/15
4)solve the equation 3(absolute value bars x5)=12. my answer = null set
5)solve the equation (absolute bars y8)+6=15. my answer = 17 I'll stop here for right now.
3. If y is in the denominator, you are right.
4. No, x=9 works, as does x=1
5. y8=± 9 so y=8±9
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