100 POINTS AND WILL MARK BRAINLIEST!!! Which statement explains why 13−13=−26 shares a solution with this system of equations:

10−3=29

−3+10=55

A.) Because 13−13=−26 is the product of the two equations in the system of equations, it must share a solution with the system of equations.

B.) The three equations all have the same slope but different -intercepts. Equations with the same slope but different -intercepts always share a solution.

C.) Because 10−3 is equal to 29, I can add 10−3 to the left side of −3+10=55 and add 29 to the right side of the same equation. Adding equivalent expressions to each side of an equation does not change the solution to the equation.

D.) Because −3+10 is equal to 55, I can subtract −3+10 from the left side of 10−3=29 and subtract 55 from its right side. Subtracting equivalent expressions from each side of an equation does not change the solution to the equation.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Is a square always, sometimes, or never a parallelogram

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.