Given triangle ABC, which equation could be used to find the measure of angle B?

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

Determine which solution is correct for solving 5/7y=6 reciprocals.

If the formula (formula in picture) were used to find the r-value of the following data, what would be the value of to three decimal places?