Marlena solved the equation 2x + 5 = –10 – x. Her steps are shown below.

2x + 5 = –10 – x

3x + 5 = –10

3x = –15

x = –5

Use the drop-down menus to justify Marlena’s work in each step of the process.

Step 1: addition property of equalitymultiplication property of equalitycombined like terms

Step 2: subtraction property of equalitydivision property of equalitycombined like terms

Step 3: addition property of equalitydivision property of equalitycombined like terms

Whats the name of the vertical axis

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?

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