Question

Please help. Not sure how to do this

Answer 1

Part A: Three terms with variables and exponents separated by addition or subtraction.

Part B: No

Part C: Yes

Explanation:

Part A & B: Terms in an expression are piece separated by addition or subtraction.

Here there are three because they are separated by an addition and a subtraction sign.

The degree of an equation is the highest exponent on the variable in the expression. Lets write them in order as
`-7x^9+3x^6+5x^3`. Here it is 9. The student is incorrect.

The leading coefficient is the number of the term with the highest exponent. Since 9 is the highest then -7 is the leading coefficient. It is negative not positive.

Part C: If x=1 then the expression becomes

`-7(1^9)+3(1^6)+5(1^3)\\-7*1+3*1+5*1\\-7+3+5\\-4+5\\1`

This means when x=1 the expression is 1. 1 term with no variable and no exponent or degree.