Standard error (SE)

Or

Therefore, SE of the mean = (8)/(2) =4
Answer:
The function only has one zero.
x = 1 actual coordinate (1, 0) on graph
Step-by-step explanation:
The shapes are similar.
When two figures are similar, the ratios of the lengths of their corresponding sides are equal.
Therefore,

Simplify:

Cross multiply:
42(10+x) = 57x
420 + 42x = 57x
420 = 57x - 42x
420 = 15x
x = (420÷15)
x = 28