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Prove that for all integers m and n, m + n and m - n are either both odd or both even.?

prove that a necessary and sufficient condition for a non negative integer n to be divisible by a positive integer d is that n mod d = 0?

Prove that for all real numbers c, if c is a root of a polynomial with rational coefficients, then c is a root of a polynomial with integer?

Suppose a is an integer, If a mod 7 = 4 what is 5a mod 7?

Please help me with this math question?

Finite math. Please help!?

Solve the inequality 1<=abs(2-x)<=5?

Solve this maths question?

Find all real solutions of 2αx^6 + x^3 -2β=0.Express your answers (i) symbolically with square/cube roots(ii) numerically,showing 4 dec plac?

Everytime I put e^ix in my calculator (Casio fx 991 es plus, complex mode) for any values of x, I get math error. Why?

Do i still need to learn how to compute with logarithms?

Are the following algebric expressions correct?

Given that f(x) = 5x and g(x) = x2 +1, find f(g(x)), g(f(x)) and g(f(2)).?

What is the inverse of f(x)= 2-x/5x?

what is the HCF (Highest common factor) of 48 and 36?

Is 521 divisible by 6?

The product of two numbers is 16. Express the sum of the squares of the two numbers as a function of a single variable.?

Finding the measures of angles and classifying relationship help!?

Find the measure of A and B. Complementary Angles?

a limo company charges $55 to rent a limo plus $12.75 for each hour What is the greatest # of hours you can rent a limo if u have $130?

Let α and β be the roots of the equation 2x^2 + 1 = 4x without finding the values of α and β find (1/α) + (2/β).?

Help with Probability?

Find the vertical and horizontal asymptotes. (If an answer does not exist, enter DNE.)?

solve the equation x-15=25 and state euclid's axiom used here?

Algebra 2?

Solve for a and b.?

find the number of solutions to the equation 2x+5y=2015 where x and y are positive integers?

Algebra 2?

For which values of b will the equation x^2+bx+1=0 have real solutions?

Need help with this math question!! Please!!!?

The total cost in $ of manufacturing 'm' treadmills is given by the function c(m)=m^3-20m^2+500m+100. What's the cost of 2 treadmills?