The graph of y= f(x) is the solid black graph below. Which function represents the dotted graph? Please help, will give brainlist if correct

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.

This activity will you meet these educational goals: mathematical practices-you will make sense of problems and solve them, reason abstractly and quantitatively, and usemathematics to model real-world situations.directionsread the instructions for this self-checked activity type in your response to each question, and check your answers. at theend of the activity, write a brief evaluation of your work.