**GIVING BRAINLIEST ASAP** Are the following polynomials a function
f(x)=5x^(4)+3x^(2)+6x^(-1)-3
f(x)=(7)/(8)x^(3)+2x^(5)-6x+17
f(x)=5\sqrt(3+4x)
f(x)=(1)/(x^(2))+(1)/(x)-12x^(2)

f(x)=5x^(4)+3x^(2)+6x^(-1)-3:yes

f(x)=(7)/(8)x^(3)+2x^(5)-6x+17:yes

f(x)=5\sqrt(3+4x):No

f(x)=(1)/(x^(2))+(1)/(x)-12x^(2):Yes

answer: i realy don't get it that much can you me figer it out pleas you

step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w