Tamara says she used the GCF to factor the expression 21x + 56xy as 7(3x + 8xy). Is she correct? Explain.
A.

Yes; 7 is the GCF.
B.

No; 14 is the GCF.
C.

No; 7x is the GCF.
D.

No; 7xy is the GCF.
pls give work

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?