At polynomials pizza, a large cheese pizza costs $6.50. each additional topping for the pizza costs $1.45. the total for a large pizza that brandon ordered was $13.75. part a define the variable t = part b write the equation. part c how many toppings did brandon have on his pizza? enter answer

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

How do you solving the solution of each system using elimination?