Answer:
an expression that contains a variable or variables is an known as an algebraic expression
Explanation:
An expression containing variables, numbers, and operation symbols is called an algebraic expression. A term can be a signed number, a variable, or a constant multiplied by a variable or variables
Answer:
Alferd Binet
Explanation:
he invented the first practical IQ test,the Binet- Simon test.
Habits, just took the test and the answer should be right.
Explanation:
overt-doesnt disturb the normal behaviour of the group so there is a bigger validity.
covert-rewuires no deception and participants are able to give their own informed consent.
