Can you explain how you got the answer

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

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

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression