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A girl went to school for the first time and the teacher asked her, how old are you? The girl said, I don't know but, I know my mother's age is twice my age . The Teacher asked then, how old is your mother? The girl said I don't know but, I know my father is five years older than my mother. The teacher asked, then how old is your father? The girl said I don't know but, I know the sum of our ages will give you one hundred.

(a) How old is the girl?

(b) How old is the mother?

(c) How old is the father?

SHOW WORKINGS PLEASE

Which of the following contains a variable?

Which scenarios are most effectively explored by conducting an experiment? there is more than one correct answer. select all that apply. researchers want to study the effectiveness of a particular drug for treating migraines. they want to know which dosage of the drug yields the best results with the least side effects. to ensure fair results, the researchers want to ensure that participants and dosage administrators do not know which dosage participants receive. a teacher wants to plan a class fieldtrip and quickly determine where students prefer to go for the class fieldtrip. a car mechanic wants to know which of two engine brands makes better-performing engines. he wants to test the engines in identical situations and rate their performance in a way that can be fairly measured. a chemist studies the properties of a metal compound. she wants to know how the sample size of the metal affects its ability to conduct electricity. she wants to conduct the research in a controlled environment to minimize bias. a realty company wants to know the average income of its clients. the company wants to gather data income from current clients.

What is the value of 4x to the third +4x if x is 4