If a = 9 and b = 4, what is the value of 2a – b?
A
10
B
B
14
25
D
72

14

Step-by-step explanation: It’s a good idea to get into the habit of

using parentheses when substituting numbers in for variables.

Since a = 9 and b = 4, 2a - b is 2(9) - (4).

Now think about your order of operations.

Multiplication comes before subtraction so first multiply 2(9) to get 18.

So we have (18) - (4) which is 14.

1760 kilometers

step-by-step explanation:

multiply the amount of time the plane took to travel by it's speed

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1