Iam doing test corrections and i found that this would be the graph for the function f(x)=4x^2-8x+7 but i’m not sure why.

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

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers