A rational number is a number that you can be written as a ratio and a irrational number is a real number that cannot be written as a ratio or integer as a fraction.
Answer:
y= 3
Step-by-step explanation:
1. plug in 7 - 2y for X in 2x = y = 5 it would look like this 2(7-2y) = y= 5
2. distribute the 2 with what is in the parenthesis. remember PEMDAS!! it would be 14 - 4y + y = 5
3. get the y alone. to do this subtract 14 from both sides. you will have
-4y + y = -9
4. combine the Y. you will get -3y = -9 (remember there is a 1 in front of alone variables that is how i got - 3)
5. divide to get the Y alone. that will be -9/-3 which is 3
your final answer: Y= 3
hope this helped :)
Answer:
C
Step-by-step explanation:
the x,y matrix will have the form of some x coefficient value, some y coefficient value and then the answer. if one of these values are missing you use a 0 as placeholder. look at the coefficients here. you know one equation will have an x coefficient of 2 and a y coefficient of -3 with a solution of 8 and the other equation will have x coefficient of 5 and no y at all with a solution of 10. only option c meets these criteria
