How would I write three times a number plus 5 times a number +4 is 196 as an equation

Given right triangle xyz, which correctly describes the locations of the sides in relation to

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Draw a tape diagram to represent each situation. for some of the situations, you need to decide what to represent with a variable andre bakes 9 pans of brownies. he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students