polynomial functions
Find the zeros.
f(x)=(x-3)(x+2)2X=-2
x=3
What is the value of log381
4
Brian has some quarters and nickels. He has three times as many quarters as nickles, and the coins are worth a total of $11. Which augmented matrix can be used to determine the number of quarters and the number of nickel Brian has? Not multiple choice.
1 -3:0
.25 .75:11
312x=9x+7
What value of x,rounded to the nearest tenth, is a solution to the equation?
X=1.4
A bag contains 5 red, 3 blue, and 2 green marbles. One marble is randomly selected. What is the probability the marble is NOT blue?
7/10
The polynomial f(x) = X2+kx+81 is a perfect Trinomial. What is the value of k?
K = 18
Which expression is equivalent to log5125=3
53=125
What statements describe parameters? Select THREE
A.The mean height of all 15 players on a basketball team is 73 inches.
B. There are 240 trees in an orchard, and 30% of them are apple trees.
C. Out of 32 employees at a company, the range of the employe ages is 25 years.
D.The standard deviation of the weights of a random sample of 95 bluebirds is 1.1 grams.
E. A teacher asked a random sample of 20 students what their favorite season is, and 45% said summer.
A.
B.
C.
A factory packages bags of flour. The weights of the bags are normally distributed with a mean weight of 5.0 and a standard deviation of .08 pound. Quality testers find a bag of flour that weighs 4.95 pounds. What is the z-score of this bag’s weight?
-.625
A spinner has 4 equal sections numbered 1-4. A coin is flipped. What is the probability of landing on 4 AND getting heads?
1/8
Find the zeros
2x3-5x2-18x +45
X = -3 x= 5/2 x = 3
Simplify:
log(x2y)-log(x)
A certain cylinder has a radius of r inches. It’s volume in cubic inches is given by the expression 2 pie r^3. What statement must be true?
A.Cylinders radius is 2 inches.
B.Cylinder’s height is 2 inches
C.Cylinders radius is 2 times its height.
D.Cylinder’s height is 2 times its radius.
D
A company assigns each employee a random 6-letter code,using the letters E,F,G, and H. Letters can be repeated. Which number is closest to the probability that an employee’s code will not contain the letter G
A box contains 6 math books and 4 science books. Two books are chosen without replacement. What is the probability both books are math?
1/3
What is the remainder when (x3+8x2+6) is divided by (x+4)?
70
log2(x-1)=4
15
The length of songs in a playlist are normally distributed with a mean time of 140 seconds and a standard deviation of 10 seconds. Which number of seconds is closest to the length of a song on the playlist with a z-score of -0.5.
B.
The volume V of a cylinder with length h and radius r is given by V=pier2h. An unsharpened pencil has a length of 17.5 centimeters and a radius of 5 millimeters. Which value is closest to the volume of the pencil,in cubic centimeters?
13.74
The probability that is rains tomorrow is 0.35 . What is the probability it does not rain?
Determine whether x+1 is a factor of the polynomial
—2x4 + 3x3 + x - 6It is not a factor
5
A store sells roses. Last week, the store sold 250 roses at a price of $4 per rose. The store manager predicts that each increase of $1 per week. Which equation represents the predicted total weekly revenue, R, in dollars, if the store increases the price of each rose by x dollars.
D.
A circle has a center at (6,2). Point B (12,15.75) is on the circle. What is the radius of the circle, rounded to the nearest whole unit?
15
How many different ways can 5 students line up in a row?