Question 1 simplify. 14 – 6.2 • (–3 + –7) a) 76 b) –48 c) –78 d) 78 question 2 simplify. –3 • 5 – 7 • 4 a) –13 b) 13 c) –43 d) 43 question 3 evaluate the expression when x = –12. 3x – 17 a) 53 b) –53 c) –19 d) 19 question 4 evaluate the expression when x = –8. 7x + 5 a) 4 b) 51 c) –51 d) -4 question 5 evaluate the expression when r = 8.2 and s = –3.7. r – 2s a) 15.6 b) 0.8 c) –22.94 d) 4.5

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?