Gabriela has dinner at a café and the cost of her meal is $45.00. Because of the service, she wants to leave a 15% tip. What is the total cost of her meal?

How do you use the elimination method for this question? explain, because i really want to understand!

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)