The horizontal value at which the highest point of a variable's normal curve occurs is also the of the variable.
a) mean only
b) mode and mean only
c) median and mean only
d) mean, median, and mode

For plato users Correct answer is D

Step-by-step explanation:

Please give me a thanks on my answer :D

b

step-by-step explanation:

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^