10. When Raphael solved the system below by using the method of elimination, he changed the second equation to –8x – 2y =-2. What property justifies this manipulation?
8x + 3y = 7
4x + y =1

e we'll

Step-by-step explanation:

second equation

to –8x – 2y =-2. What property justifies this manipulation?

8x + 3y = 7

4x + y =1

YES ALL THE CONDITIONS HAVE BEEN MET

Step-by-step explanation:

H o:mu1=mu2

Ha:mu1 not = mu2

n1=30

n2=30

large samples follows normal distribution

and they are independent samples

we can conduct t test for 2 groups we can ignore that condition randomness

YES ALL THE CONDITIONS HAVE BEEN MET