Anybody play COD mobile​

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25