Answer:
1 is a solution, 2 isnt
Step-by-step explanation:
For number 1,both problems are true with the given values of x and y, but with number 2, oy the second problem is true
Answer:
Step-by-step explanation:
15 + 720 is 1120
How many time that 6688 could into 16 which is 418
Your answer is

because the numbers raised to negative powers must be flipped over the divisor to become positive. Then, when multiplying 2 and z, you add their exponents.
The anwser is ten because the number i saw is 14 estimate is ten.