Instruction Active
Writing a Two-Column Proof
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Angles Reasons
Given: ZABC e ZDEF and
ZGHS ZDEF
Prove: m ZABC = mZGHI
LABC
ZDEF
ZGHI
mZABC
x
mZGHI
Statements
✓ 1. LABC - ZDEF
✓ 2. ZGHI ZDEF
3. ZDEF - ZGHI
4. ZABC - ZGHI
Reasons
1. given
2. given
3. symmetric property
4. transitive property
Demo

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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?

Which value of y will make the inequality y< -1 false?