Two sets of quadratic expressions are shown below in various forms:
line 1: x2 − x − 6 (x + 2)(x − 3) (x + 0.5)2 − 6.25
line 2: x2 − x − 2 (x + 1)(x − 2) (x − 0.5)2 − 2.25

which line contains three equivalent expressions?

the correct answer is line 2 only
(i am doing this because i couldn't figure out how to answer the actual question because it had a pre existing answer so i could figure it out) so my real question is how to answer questions that are already answered

Find the value of x for which the lines are parallel.

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels