prove that there does not exist n∈N such that n≡2 (mod 4) and n≡4 (mod 8). Please help this was on my last exam but I was very lost and my professor did not have enough time to go over it in class...

prove that there does not exist n∈N such that n≡2 (mod 4) and n≡4 (mod 8). Please help this was on my last exam but I was very lost and my professor did not have enough time to go over it in class...

what is and a and b if ax43 + bx47=1. Please show me the steps I really want to know how to go about a problem like this. I got this wrong on the latest exam and my professor never goes...

a) Factorise 3x^2+19x+20. b) Hence, Factorise 3(y-2)+19(y-2)+20

Please help me find the answer!

This is a hard math problem.

This is a hard math problem.

The lengths of three sides of a regular hexagon are (12x+9y) cm, (7x+6y+3) cm and (4x+5y+2) cm. Find, (a) the values of x and y (b) the perimeter of the figure

The answer is ???

The answer is ???

How many gallons?

How many ounces?

? mph and ? mph

? pounds at $1.16 and ? pounds at 86 cent

The answer is ? tablespoons!

Please help me!

Maria is ? years old Robert is ? years old

Its hard!

It looks easy, but It is hard!

Here is the whole problem: The conjugate of the sum of two complex numbers is equal to the sum of the conjugates of the two numbers. Using a+bi and c+di to represent two complex...

I dont get it!!