Question

Given the function T(z) = z – 6, find T(–4).  

Answer 1

$(1)\\T(z)=z-6\ \ \ \Rightarrow\ \ \ T(-4)=-4-6=-10\ \ \ \Rightarrow\ \ \ Ans.\ B.\\\\(2)\\range:\ \ \ Y=\{2;\ 4;\ 6;\ 8;\}\ \ \ \Rightarrow\ \ \ Ans.\ A.\\\\(3)\\domain:\ \ \ D=\{1;\ 3;\ 5;\ 7\}\ \ \ \Rightarrow\ \ \ Ans.\ B.\\\\(4)\\ \frac{p}{d} =constant\\\\\frac{2}{7} =\frac{10}{d} \ \ \ \Leftrightarrow\ \ \ 2d=7\cdot10\ \ \ \Leftrightarrow\ \ \ d= \frac{7\cdot2\cdot5}{2} =35\ \ \ \Rightarrow\ \ \ Ans.\ D.$

$(5)\\900\ calories\ \rightarrow\ 3\ hours\\x\ \rightarrow\ \ 1\ hour\\\\x= \frac{900}{3} \ calories=300\ calories\\\\C=300\cdot t\ \ \ \Rightarrow\ \ \ Ans. \ A.$