Quest? es matemáticas 4) 3a- 4b ( 4 - 7a + 2b ) + b 6) 3mn ( m? + n? - m + 4n - 5 ) 8) ( x + ? 5 )? 9) ( 4x + 2y )? 10) (2w-1,6)? 13) (x+11)(x+18) 15) (x+4,7)(x+3,25) considere x=-4, y=48 e z=2,7 17) 2x-y+3z 18) xz+1,57 20) x? +2x? -4x

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

What is the solution to the inequality? 6x−5> −29, a x> −4 bx> 4 cx< 4 dx< −4

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?