Did we invent math or did we discover it?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g