What is 1 + 1 i just can't remember

Describe the domain and range of y=2(3)^x-2+5

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Factor the expression using the gcf. the expression 21m−49n factored using the gcf