Given that the gradient of straight line passing through M (3,k) and N (-1,5) is -3, calculate the value of k.

3(10x-y)-5(x-y^2) need this solved asap

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

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.