find the value of the function y=3x sqr - 21 when x=4
To find the value of the function when x=4, we substitute 4 in place of x in the function:
y = 3(4)^2 - 21
y = 3(16) - 21
y = 48 - 21
y = 27
Therefore, when x=4, the value of the function y is 27.
wrong
I apologize for the mistake. Let me recalculate:
Given function: y = 3x^2 - 21
Substitute x=4 into the function:
y = 3(4)^2 - 21
y = 3(16) - 21
y = 48 - 21
y = 27
Therefore, when x = 4, the value of the function y is 27.