Answer:
12 games
Step-by-step explanation:
Let x be the number of games played
The y won 75% of the games played and that was 9
x * 75% = 9
Change to decimal form
x * .75 = 9
Divide each side by .75
x * .75 /.75 = 9/.75
x =12
They played 12 games
Answer: B. Controlled experiment
Step-by-step explanation:
This is a controlled experiment because the variables in the question are manipulated by the researcher. We are told that while one group watches television before going to sleep, the other group does not.
The controllers won't have control over the variables that were used if it was an observational study while for a survey, it has to do with collection of information regarding certain topics or happenings in order to have people's perception on the topic or area of interest.
Answer:
x - 14 < 25
Step-by-step explanation:
You solve this by replacing the words with the number, letter or symbol they equal. So a number is x and decreased is subtraction. So far you have, x - 14. Then you look at less than and you know that the less than symbol is < so you plug that in and then you put 25 on the end.
X= number of adult tickets sold
y= number of kids tickets sold
7x+20y=236
21x+50y=618
solve for x
