Q. If f(x)=−20+x−3, what is the value of f(3), to the nearest tenth (if necessary)?Answer:
Substitute x with 3: To find the value of f(3), we need to substitute x with 3 in the function f(x)=−20+x−3.So, f(3)=−20+3−3.
Calculate square root of 3: First, calculate the square root of 3. 3 is approximately 1.732.
Substitute 3: Now, substitute 3 into the function.f(3)=−20+1.732−3.
Perform addition inside parentheses: Next, perform the addition inside the parentheses. −20+1.732=−18.268.
Divide −3 by −18.268: Now, divide −3 by −18.268.f(3)=−18.268−3=18.2683.
Simplify fraction and round: Finally, we simplify the fraction and, if necessary, round to the nearest tenth. 18.2683 is approximately 0.164 to three decimal places. Rounded to the nearest tenth, this is 0.2.