Help plz I don't understand

1 - a. addition

2 - c. constant

3. - b. coefficient

4. - d variable

Step-by-step explanation:

+ is the universal sign for addition

11 is a number which is always constant

here w doesn't have a constant value and can be any number. hence it is a variable

the 2 in the 2w is a number which multiplies with the variable w. the value of 2w varies with the value of w. So here 2 is the coefficient of the w in 2w

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points