A single number is chosen from 1 to 20. Find the probability that t...

  1. Home
  2. Homework Library
  3. Mathematics
  4. Algebra
  5. A single number is chosen from 1 to 20. Find the probability that t...

QuestionQuestion

A single number is chosen from 1 to 20. Find the probability that the number is an even or a number divisible by 7.
1/2
3/5
11/20
13/20
none of the above

Find the vertex, focus, and directrix of the parabola x² – 4y + 8 = 0
Vertex( 0, 2)
Focus (0, 3)
Directrix y = 1

Vertex( 0, 3)
Focus (0, 3)
Directrix y = 1

Vertex( 0, 2)
Focus (0, –3)
Directrix y = –1

Vertex( 0, 4)
Focus (0, 4)
Directrix y = 5

none f the above

Find the mayor axis o the ellipse: 9x² + 25y² = 225
2a = 25
2a =16
2a = 10
2a = 20
none of the above

Find the vertex, focus, and directrix of the parabola y² = –5x
vertex (0, 0)
focus (0, 5/4)
directrix x = –5/4

vertex (0, 0)
focus (–5/4, 0)
directrix x = 5/4

vertex (0, 0)
focus (–5, 0)
directrix y = 5

vertex (0, 0)
focus (0, 9/4)
directrix x = –9/4

none of the above


Find the center, vertices and foci of the ellipse: 12x² + y² = 36
Center (0, 0)
Vertices (0, ±5)
Foci (0, ±√3)

Center (0, 0)
Vertices (0, ±6)
Foci (0, ±√2)

Center (0, 0)
Vertices (±5, 0)
Foci (±√15, 0)

Center (0, 0)
Vertices (0, ±6)
Foci (0, ±√33)

none of the above

A jar contains 4 red marbles, 6 blue marbles, and 10 yellow marbles, and two marbles are drawn at random with replacement, what is the probability to select one blue and one not blue marbles?
4/25
21/100
1/50
3/20
none of the above

The nth term of a Geometric Sequence with first term a1 and common ratio r is:
an = a1rn
an = a1r(n –1)
an = 2a1r(n +1)
an = a1r(n +1)
none of the above

An urn contains 8 white balls, 2 green balls, and 6 pink balls. If 2 balls are drawn at random without replacement, what is the probability to drawn 2 green balls?
1/15
1/120
7/30
7/15
none of the above

An equation in three variables (x, y, z) represents
a line
a sphere
a plane
a cylinder

Solve the system of equations by the Elimination Method:
x – 2y = 1
2x – 5y = –2

Find the foci and the asymptotes of the hyperbola: y2 – 4y – 4x2 – 24x – 36 = 0
Foci (–4 ±√13, –2)
Asymptote: 3x – 2y = –8
Asymptote: 3x + 2y = –16

Foci (3 ±√5, –1)
Asymptote: 2x – 3y = 9
Asymptote: 2x + 3y = 3

Foci (–3, 2 ±√5)
Asymptote: 2x – y = –8
Asymptote: 2x + y = –4

Foci (2 ±√13, –1)
Asymptote: 2x – 3y = 9
Asymptote: 2x + 3y = 9

none of the above


A set of cards has 5 red cards and 5 black cards. If 3 cards are selected at random, what is the probability to select at least 1 black card.
7/8
1/2
117/125
1/8
none of the above

A set of cards has 6 red cards and 4 black cards. If 3 cards are selected at random, what is the probability to select at least 1 red card.
91/216
7/8
98/125
117/125
none of the above

The product of two matrices A and B is defined if and only if:
matrices A and B have the same order

matrices A and B have nonzero elements

the number of columns of the first matrix A is equal to the number of rows of the second matrix B

the number of rows of the first matrix A is equal to the number of columns of the second matrix B

none of the above

Solution PreviewSolution Preview

These solutions may offer step-by-step problem-solving explanations or good writing examples that include modern styles of formatting and construction of bibliographies out of text citations and references. Students may use these solutions for personal skill-building and practice. Unethical use is strictly forbidden.

1. choice C
2. choice A
3. choice C...

By purchasing this solution you'll be able to access the following files:
Solution.docx.

50% discount

Hours
Minutes
Seconds
$50.00 $25.00
for this solution

PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

Find A Tutor

View available Algebra Tutors

Get College Homework Help.

Are you sure you don't want to upload any files?

Fast tutor response requires as much info as possible.

Decision:
Upload a file
Continue without uploading

SUBMIT YOUR HOMEWORK
We couldn't find that subject.
Please select the best match from the list below.

We'll send you an email right away. If it's not in your inbox, check your spam folder.

  • 1
  • 2
  • 3
Live Chats