Answer:

Step-by-step explanation:
Let
x------> the number of blue cards
y-----> the number of green cards
we know that

isolate the variable y
-----> equation A
we have
substitute the value of x in the equation A to find the value of y

Should be false because -7 x -7 is not -49 it is 49
Answer:
The answer is A
Step-by-step explanation:
I got it wrong and it showed that it’s A
By factoring, x equals both -5 and 7.
Answer:
Domain: (−∞,∞),{x|x∈R}
Step-by-step explanation:
the domain will be Domain: (−∞,∞),{x|x∈R} because
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.