Which graph represents the sequence 2, 3.5, 5, 6.5

For each proportion find the unknown number x 1/5/8=×/15

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove