Question

Evaluate the following expression for the given values of the variables. Please explain i’m really struggling with this! 3m - 4n; For m= -2 and n= -3 A) -6 B) 6 C) -18 D) 18

Answer 1

`\boxed{ \bold{ \sf{ \huge{ \boxed{6}}}}}`

Option B is the correct option.

Explanation:

Given, m = -2 and n = -3

Given expression : 3m - 4n

If the value of variables of algebraic expressions are given, the value of the term it expression can easily obtained by replacing the variables with numbers.

Let's solve:

`\sf{3m - 4n}`

Plug the values of m and n

`\sf{ = 3 * ( - 2) - 4 * ( - 3)}`

Multiply

`\sf{ = - 6 - ( - 12)}`

When there is a ( - ) in front of a parentheses, change the sign

`\sf{ = - 6 + 12}`

Calculate

`\sf{ = 6}`

Hope I helped!

Best regards!!

Answer 2

Hey there!

Given Expression: 3m-4n

Substitute: 3(-2)-4(-3)

Solve: -6+12

Simplify: 6

6 should be your final answer.

Let me know if this helps :)