Two polynomials are added and the sum is 3x^2-y+4. For each statement, state weather it is always true, sometimes true or never true. Explain or provide a counter example to justify our answer.
a) both are monomials

b) both include a y-term

c) if there is a x-term in one polynomial, then there must be a x-term in the other

d) both are monomials

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

if you was gonna solve for a, a is a   < -12

idk

step-by-step explanation:

payback

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.