Answer:
Step-by-step explanation:
3/4 of children mar buying lunch because if u divide 27 by 9 you get three, which is the numerator. Then you divide 36 by 9 to get 4, which is the demoninator. making the simplied version 3/4
63×8 =504 because you are using repeated addition r just regular multiplication
Answer: 8z 8(z)
Explanation: well 8 times z is simply 8(z)I don’t really think there is another way
Substitution is best to use one one or both equations is already solved for one of the variables. Elimitation can be use if all variables have a coefficient other than 1.
