Which expressions are polynomials?

select each correct answer.

x2+5x15

−x2+5x

6x² + 5x

−7x2+53x

They all are polynomials.

Step-by-step explanation:

Given : Following expression

1)  

2)  

3)

4)

The following all are polynomials because polynomials are:

An expression consisting of variables and coefficients or expression more than two algebraic terms and the terms that contain different powers of the same variable(s) involve operations addition , subtraction, multiplication and non-negative integer exponent of variables.

So when we see to these functions they all are a mixture of a polynomial.

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.

the answer is y = 11.54

hope this : )