Help me on this question please because I might fail school

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

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?