Answer:
1) A , 2) C , 3) D
Step-by-step explanation:
Answer:
1A) Degree: 3
1B) 4 terms
1C) 
2A) 
2B) 
Step-by-step explanation:
The given polynomial is 
Let us rewrite the polynomial in decreasing powers of x.
This gives us the expression;
-----> This is called the standard form.
So let us answer the question:
A) The degree is the exponent of the first term when the polynomial is written in standard form.
Degree: 3
B) The terms are separated by + or - signs.
Number of terms: 4
C) Standard form: 
2A) The given expression is 
We expand using the distributive property to get:

We regroup the terms to get:

We simplify to obtain:

2B) The given expression is 

Regroup the terms to get:

We simplify to get:

Answer:
Henry is 5kg short of cement.
Step-by-step explanation:
4:3:1
Cement : Sand : Gravel
We can also write the ratio as:
4 x Gravel : 3 x Gravel : 1 x Gravel
Therfore a logical "x" would be the amount of gravel.
If we substitute gravel with x and put it in an equation we get:
4x+3x+x=120
8x=120
x=120/8
x=15
This way we can check if each value is correct.
x = Weight of Gravel = 15kg Correct
3x = Weight of Sand = 45kg Correct
4x = Weight of cement = 60kg WRONG!
The actually weight of cement is 55kg.
Therefore Cement is 5kg short.