Discriminant and the number of real roots for this equation 9x2+12x+4=0

Show that det (A) = 0 without directly evaluating the determinant. A = [-4 1 1 1 1; 1 - 4 1 1 1; 1 1 - 4 1 1; 1 1 1 - 4 1; 1 1 1 1 - 4]

In a survey of a random sample of 40 people, it was found that 20 people liked chocolate ice-cream while 30 people liked vanilla. every person surveyed liked at least one flavor of ice-cream.

Find f (-5) if f (x) = |x + 1|. A. 4 B. 5 C. 6

1. A bicycle race has 8 contestants. How many ways can the contestants finish first, second, third, fourth in the race? a. 70 b. 336 c. 1680

A woman put $580 into a savings account for one year. the rate of interest on the account was 6 1/2%. how much was the interst for the year in dollars and cents?

One month Diane rented 12 movies and 2 video games for a total of $65 . The next month she rented 3 movies and 5 video games for a total of $41 . Find the rental cost for each movie and each video game.

Which of the following would NOT be the result of a substitution in the following system? 2x + y = 7 y - x = 1 Answers A. 2 (y + 1) + y = 7 B. 2x + x + 1 = 7 C. 7 - 2x - x = 1

Which can be used to describe an equivalent expression for (s Superscript 6 Baseline) Superscript negative 3? Adding the exponents will create an equivalent expression. Dividing the exponents will create an equivalent expression.

If tan θ = 9, find the exact value of cot (θ). A. 8 B. 10 C. 1/9 D. 9

If the number is 5,678.321 what is the underlined digit of the 5