Which of the following statements is always true? a: all rational numbers are whole numbers. b: all real numbers are rational numbers. c: all irrational numbers are real numbers. d: all square roots are irrational numbers.

What is (28 + 7 + 6 + 3) x 1/2 show your work

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a