What is 7x^2 – 4 + 6x^3 – 4x – x^4 in standard form. And can u please put steps..

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

answer: 10 meter

step-by-step explanation:

need details

the answer is

d.

5.3066 m2

step-by-step explanation:

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated