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{:[k(t)=10 t-19],[k(-7)=]:}

k(t)=10t−19k(−7)= \begin{array}{l}k(t)=10 t-19 \\ k(-7)=\end{array}

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Full solution

Q. k(t)=10t−19k(−7)= \begin{array}{l}k(t)=10 t-19 \\ k(-7)=\end{array}
  1. Substitute t t with −7 -7 : To find the value of k(−7) k(-7) , we need to substitute t t with −7 -7 in the function k(t)=10t−19 k(t) = 10t - 19 .\newlinek(−7)=10(−7)−19 k(-7) = 10(-7) - 19
  2. Perform multiplication: Now, we perform the multiplication 1010 times −7-7.\newline10(−7)=−7010(-7) = -70
  3. Subtract 1919: Next, we subtract 1919 from −70-70 to get the value of k(−7)k(-7).\newlinek(−7)=−70−19k(-7) = -70 - 19
  4. Perform subtraction: Finally, we perform the subtraction to find the value of k(−7)k(-7).k(−7)=−70−19=−89k(-7) = -70 - 19 = -89

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