3, 9, 27, 81, 243 … If the sequence defines a function, what is a reasonable domain and range of the function? a. domain: {1, 2, 3, 4, 5}Range: {3, 9, 27, 81, 243}
B. Domain: all real numbers;Range: all real numbers
C. Domain: all real numbers; Range: {3, 9, 27, 81, 243, }
D. Domain: {1, 2, 3, 4, 5,};Range: all real numbers

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13

Lena draws a square with an area that is greater than the area of rectangle b. what are two possible side lengths of lena's square? explain.