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
MAXImum [283]
3 years ago
12

Can someone help with these? WILL GIVE BRAINLIEST.

Mathematics
1 answer:
vivado [14]3 years ago
5 0

Nine

Correct

Ten

The only way I have of solving any of these is either to graph them, or solve them as cubics.

This one is graphed. The choice is C. All are real and 2 are the same. See graph below.

Eleven

Using Pascal's triangle, the fifth line is 1    5   10   10    5    1

So the answer should be 5p^4q

Twelve

Use Synthetic Division

2  || 1     2   - 5     -6

            2     8      6

=====================

      1     4     3       0

So the quadratic that's left of this division is

x^2 +4x + 3 =0 for the roots.   Factor

(x +3)(x + 1)

These equal zero                

x + 3 = 0

x = - 3

x + 1 =0

x = - 1

===============

Answer: Roots (-3, 0)(-1 , 0)

Answer: -3,-1,2

Thirteen

Use synthetic division on all of them. Start out with trying to find -1 as a root. The one that works is C. Then you try -2 also using synthetic division. It also turns out to be a solution for the quartic. What is left over is x^ + 1 which does not factor in the reals.

- 1 || 1    3     3     3     2

           -1     -2    -1    -2

=======================

      1     2    1      2      0


-2 || 1    2    1     2

           -2    0   -2

===================

     1    +0   1

The left over is x^2 + 1 = 0 The roots of this are +/- i which is not in the real number system.    

Answer: C


You might be interested in
Find the unique permutations of the letters of the word : CEASELESS
irina1246 [14]

Answer:

There are 2,520 unique permutations.

Step-by-step explanation:

When we have a set of N different elements, the total number of permutations is given by:

P = N! = N*(N - 1)*(N - 2)*...*(2)*(1)

Particularly, if out of these N elements, there are a given element that is repeated K times, then the permutations of these K elements actually do not add new unique permutations, then in that case the total number of unique permutations is:

P = N!/K!

And if we have another element that is repeated L times, then with the same reasoning than above, the total number of unique permutations is:

P = N!/(K!*L!)

Now, we have the set:

{C, E, A, S, E, L, E, S, S}

So we have a set of 9 letters, then:

N = 9

And, the letter S is repeated 3 times

The letter E is repeated 3 times

Then, using the above notation, we can define:

K = 3

L = 3

The total number of permutations is then:

P = \frac{9!}{3!*3!}  = \frac{9*8*7*6*5*4*3*2*1}{3*2*1*3*2*1} = \frac{9*8*7*6*5*4}{3*2*1} = 2,520

So there are 2,520 unique permutations.

8 0
3 years ago
The CBGC pays college and high school students $5.75 per hour to tutor the younger boys and girls. If one of those tutors works
Levart [38]

Answer:

1. $35.075

2. 43.5 hours

3. 70%

4. Danny is correct

5. Abe's score out of the 30 points of the last quiz to get an overall checkup quiz grade of 80% should be 28.5

Step-by-step explanation:

The pay per hour for student tutors = $5.75

1. A tutor who worked 3.4 hours on Monday and 2.7 hours on Thursday has worked, 3.4 + 2.7 = 6.1 hours for the week, therefore

The week earning for the tutor = 6.1 × 5.75 = $35.075

2. The Club's tutoring budget per week = $250

The number of tutoring hours that can be provided per week is given by the relation;

\frac{The \, Club's \ tutoring\  budget \ per \, week}{The \, pay \ per \, hour\,  for\,  student\,  tutors} = \frac{\$250}{\$5.75/hour} = 43.47826  \approx 43.5 \, hours

3. The score of 21 out of 30 as a percentage is given as follows;

\frac{21}{30} \times 100 = 70\%

4. Where the second score is 45 out of a total of 60 points, we have;

\frac{45}{60} \times 100 = 75\%

Therefore, the increase in Abe's score is 5%, therefore, Danny is correct

5. To raise his checkup quiz grade to 80% overall, then we should have;

\frac{70 + 75 + Q}{300} =\frac{80}{100}

Where:

Q = The percentage grade of the last quiz

(145 + Q)×100 = 80×300 = 24000

145 + Q = 240

Q = 240 - 145 = 95%

Therefore, he has to score, 95% of 30 on the last quiz, which is thus;

\frac{95}{100} \times 30 = 28.5

Abe's score out of the 30 points of the last quiz to get an overall checkup quiz grade of 80% = 28.5 points.

7 0
3 years ago
A coin is tossed 6 times. Find the probability P(of exactly 4 occurrences of heads).
Angelina_Jolie [31]
Let's draw!

H                             1                              T
HT                           2                           HT
HTHT                      3                      HTHT
HTHTHT                 4                  HTHTHT
HTHTHTHT            5             HTHTHTHT
HTHTHTHTHT       6        HTHTHTHTHT

You can count the probabilities using this.

HHHHTT
HHHTHT
HHTHHT
HHTHTH
HHHTTH
HTHHHT
HTTHHH
HTHTHH
HTHHTH

THHHHT
THHHTH
THHTHH
THTHHH
TTHHHH

Therefore, I think the probability is 14/64. Not sure so check my work.
14 combinations
64 outcomes (2+4+8+16+32+64 or 2^n)

7 0
3 years ago
How many numbers from 1 through 200 have a 2 in the units place and are divisible by 4?
ehidna [41]
about : 22 - 25 numbers
7 0
3 years ago
Read 2 more answers
Solve the following inequality: 30 ≥ -30 – 6x *
Aleonysh [2.5K]

Answer: The answer is x ≥ -10

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Type in only your numerical answer to the following problem; do not type any words or letters with your answer. The population o
    7·1 answer
  • A square-based prism made of clay had dimensions of 6 by 6 by 10. A pyramid was removed from the prism as shown below so that th
    7·1 answer
  • What is the area of triangle DEF?
    5·2 answers
  • There are 120 Gr. a students at a local high school and
    12·1 answer
  • What is a visual artifact? please help without copying the internet
    9·1 answer
  • Can anyone help me with it?
    5·1 answer
  • A light bulb consumes 9900 watt-hours in 5 days and 12 hours. How many watt-hours does it consume per day?
    12·1 answer
  • Expand and simplify (x-3)(x+5)
    12·2 answers
  • PLS HELP! (Picture included)
    14·1 answer
  • Name the place of the bolded and underlined digits in each number
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!