Answer:
a. (1,2), b. (1, 0)
Step-by-step explanation:
a.

b.

N= 12
Subtract 70.85 and 7.25 which equals 63.6. Then take 63.6 divided by 5.3 and it equals 12! Hope this helps.
Answer: 12
Step-by-step explanation:To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12.