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
masha68 [24]
3 years ago
6

if -2 is a root of the equation 3x2 +7x + p = 0, find the values of k for which the roots of the equation x2 + k(4x + k - 1) + p

= 0 are equal.
Mathematics
1 answer:
goblinko [34]3 years ago
4 0

Answer:

first 0ne

Step-by-step explanation:

You might be interested in
In 1998, Cathy's age is equal to the sum of the four digits in the year of her birthday, then how old was Cathy in 1998?
ycow [4]

Answer:

<em>Cathy was born in 1980 and she was 18 years old in 1998</em>

Step-by-step explanation:

<u>Equations</u>

This is a special type of equations where all the unknowns must be integers and limited to a range [0,9] because they are the digits of a number.

Let's say Cathy was born in the year x formed by the ordered digits abcd. A number expressed by its digits can be calculated as

x=1000a+100b+10c+d

In 1998, Cathy's age was

1998-(1000a+100b+10c+d)

And it must be equal to the sum of the four digits

1998-(1000a+100b+10c+d)=a+b+c+d

Rearranging

1998=1001a+101b+11c+2d

We are sure a=1, b=9 because Cathy's age is limited to having been born in the same century and millennium. Thus

1998=1001+909+11c+2d

Operating

88=11c+2d

If now we try some values for c we notice there is only one possible valid combination, since c and d must be integers in the range [0,9]

c=8, d=0

Thus, Cathy was born in 1980 and she was 18 years old in 1998. Note that 1+9+8+0=18

5 0
3 years ago
QUESTION 2
gregori [183]

Answer:

Step-by-step explanation:

ppleasepplease share the answers when got them

3 0
2 years ago
A drink is mixed in the ratio
Contact [7]

Answer:

3

Step-by-step explanation:

 Drink mix ratio:

        Lemonade   :    Orange      :     Cranberry

                 6           :          3          :          C

  Fraction  of Cranberry juice  = \frac{3}{12}

Sum of the ratio = 6 + 3 + C  = 9 + C

   Fraction of Cranberry;

                \frac{C}{9 + C}   = \frac{3}{12}

               3(9 + C)  = 12C

               27 + 3C  = 12C

               27  = 12C - 3C

                9C  = 27

                   C = 3

The missing number will be 3

4 0
3 years ago
What percent is equivalent to 12/30 ?<br><br> 12%<br> 30%<br> 40%<br> 60%
laila [671]
12/30 is = 0.4 x 100 = 40% can I have brainliest if its right?
4 0
3 years ago
Read 2 more answers
WILL MARK BRANLIEST
Naily [24]

Answer:

Brand b has a better unit price.

7 0
3 years ago
Read 2 more answers
Other questions:
  • 7 out of every 8 children surveyed owns a bike. The difference between the number of students who owns a bike and those who do n
    7·1 answer
  • What is the solution of the system? {2x+y=15x−y=3 Enter your answer in the boxes.
    9·2 answers
  • Type of percent when the final amount is greater than the ordinal amount
    6·1 answer
  • Evaluate 6+xwhen x=3​
    6·2 answers
  • What is the measure ?
    8·1 answer
  • Identify the function family to which f (x) = 8x – 5 belongs.
    5·1 answer
  • Matthew cleaned the garage in 2.5 hours he was paid x dollars per hour he then spent $3 and had $12 remaining how much was he pa
    15·1 answer
  • Yyoooo free moneys but im deleting the question if u dont say the right thing in the answer.
    15·2 answers
  • What is $25 at 14% off
    14·2 answers
  • I need help plsss
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!