1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kakasveta [241]
3 years ago
5

Help please I don’t know the answer

Mathematics
2 answers:
Liono4ka [1.6K]3 years ago
7 0

Option A is correct answer

Artemon [7]3 years ago
6 0

Answer:

option A i believe is correct

Step-by-step explanation:

 hope that helps you :)

You might be interested in
The area of a particular rectangle is 72. If the length of the rectangle is twice
soldier1979 [14.2K]

Answer:

6

Step-by-step explanation:

Suppose the width is "a".  Then the length is 2a.

2(a²) =72 Divide both sides by 2

    a²= 36

    a=6

   

4 0
2 years ago
How many complex zeros does the polynomial function have?<br> f(x)=−3x^6−2x^4+5x+6
REY [17]

one way would be to factor

I can't factor it so we will have to use Descartes' Rule of Signs which is helpful for finding how many real roots you have


it goes like this:

for a polynomial with real coefients, consider f(x)=-3x^6-2x^4+5x+6.

after arranging the terms in decending order in terms of degree, count how many times the signs of the coeffients change direction and minus 2 from that number until you get to 1 or 0. that will be the number of even roots the function can have

We have (-, -, +, +). the signs changed 1 times, so it has 1 real positive root


to get the negative roots, we evaluate f(-x) and see how many times the root changes

f(-x)=-3x^6-2x^4-5x+6

signs are (-, -, -, +). there was 1 change in sign

so the function has 1 real negative root



a total of 2 real roots


a function of degree n can have at most, n roots


our function is degree 6 so it has 6 roots

if 2 are real, then the others must be complex

6-2=4 so there are 4 complex roots


you can also show that there are only 2 real roots by using a graphing utility to see that there are only 2 real roots

7 0
2 years ago
Find the degree measure of each angle of the triangle
Karo-lina-s [1.5K]

Answer:

51,51 and 78

Step-by-step explanation:

3x+9=4x-5

3x=4x-14

-x=-14

x=14

8 0
2 years ago
Read 2 more answers
x^2-8x+15=0 solve the equation by completing the square. Round your solutions to the nearest hundredth, if necessary.
zaharov [31]

Answer:

x = 3, 5

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

<u>Algebra I</u>

  • Terms/Coefficients/Degrees
  • Standard Form: ax² + bx + c = 0
  • Multiple Roots
  • Factoring
  • Completing the Square: -b/(2a)

Step-by-step explanation:

<u>Step 1: Define</u>

x² - 8x + 15 = 0

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. [Subtraction Property of Equality] Subtract 15 on both sides:                     x² - 8x = -15
  2. Complete the Square [Addition Property of Equality]:                                 x² - 8x + 16 = -15 + 16
  3. [Complete the Square] Simplify:                                                                   (x - 4)² = 1
  4. [Equality Property] Square root both sides:                                                  x - 4 = ±1
  5. [Addition Property of Equality] Add 4 on both sides:                                   x = 4 ± 1
  6. Evaluate:                                                                                                          x = 3, 5
7 0
2 years ago
Twelve percent of the population is left handed. Approximate the probability that there are at least 20 left-handers in a school
DochEvi [55]

Answer:

Step-by-step explanation:

We would assume a binomial distribution for the handedness of the population. Let x be a random variable representing the type of handedness in the population. The probability of success, p is that a randomly chosen person is left handed only. Then probability of failure is that a chosen person is not left handed only(right handed only or both).

p = 12/100 = 0.12

number of success, x = 20

n = 200

the probability that there are at least 20 left-handers is expressed as P(x ≥ 20)

From the binomial probability calculator,

P(x ≥ 20) = 0.84

8 0
3 years ago
Other questions:
  • I dont understand and this is very urgent so can someone help me out please?
    13·1 answer
  • Please help The weight of a full steel bead tire is approximately 800 grams, while a lighter wheel weighs only 700 grams. What i
    8·1 answer
  • What is pansexuality? Give in terms that an elementary schooler (fourth or fifth grader) would understand.
    15·2 answers
  • Assume that random guesses are made for eight multiple choice questions on an SAT test so that there are n =8 trials ,each with
    6·1 answer
  • Martha can complete 15 activities a day at summer camp. She can choose between crafts or sports. Plz help me i need it!!!
    15·1 answer
  • Answer please thank you
    9·2 answers
  • Answer both question
    14·1 answer
  • After exercising, Malik checked his heart rate it was beating at 90 beats per minute. After 20 minutes he rechecked his heart ra
    11·1 answer
  • Find the largest degree of x that can be factored out of all terms<br> 9x and 45​
    14·1 answer
  • PLEASE HELP. THIS IS FOR A TEST ITS VERY IMPORTANT. I CANT FAIL THIS.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!