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
Eduardwww [97]
3 years ago
12

If x=3 is a solution of the equation 2x²-5x+k=0 find the value of k​

Mathematics
2 answers:
Novosadov [1.4K]3 years ago
8 0

Answer:

k = - 3

Step-by-step explanation:

Given that x = 3 is a solution then it satisfies the equation, that is

2(3)² - 5(3) + k = 0

2(9) - 15 + k = 0

18 - 15 + k = 0

3 + k = 0 ( subtract 3 from both sides )

k = - 3

ipn [44]3 years ago
5 0

Answer: k = -3

Step-by-step explanation:

2x²-5x+k=0

Substitute x=3

2(3)^2-5(3)+k=0

2(9)-15+k=0

18-15+k=0

3+k=0

k=-3

To check if your answer is correct you can substitute x=3 and k = -3

2(3)^2-5(3)-3=0

2(9)-15-3=0

18-15-3=0

3-3=0

So k = -3 is correct

You might be interested in
7.984 ÷ by 1.99 =  what  ???? <br><br><br><br> help plz me
Sergio [31]
7.984 ÷ 1.99= 4.01206030151

which is about 4.012

6 0
3 years ago
What is 102% as a fraction
scZoUnD [109]
102% as a fraction would be 102/100, because a percent is by the one hundreds, and you can have a fraction be by hundreds. You can reduce the fraction by dividing it by 2, which equals 51/50. Another example, to clarify, is to make 41% a fraction, and decimal. Once again a percent is base 100, so the fraction would be 41/100, then to make it a decimal, you would put a decimal point in front of the 41, to make it .41. Hope I helped, and if you don't understand, tell me and I will try to make it better.
5 0
3 years ago
Read 2 more answers
A squirrel burrowed 10 holes in 8 minutes how many holes could the squirrels burrow in 12 minutes
Alenkinab [10]

Answer:

15

Step-by-step explanation:

7 0
3 years ago
1a/3a + 2 = 11 what does a equal
VashaNatasha [74]
Because in the numerator and denominator of the fraction 1a/3a, you're able to simplify that and get 1/3. There is actually no solution to the problem you're asking. You're unable to find out what (a) equals. 
4 0
3 years ago
The sum of the digits of a two-digit number is 9. When the digits are reversed, the new number is 9 more than the original numbe
Paul [167]

9514 1404 393

Answer:

  d.  45

Step-by-step explanation:

You can check the offered answers. You will find that the difference from reversing the digits will only be 9 if the digits differ by 9/9 = 1.

The original number is 45.

__

<em>Check</em>

  45 + 9 = 54 . . . with the digits reversed

4 0
3 years ago
Other questions:
  • You buy a container of cat litter for $12.25 and a bag of cat food for x dollars. The total purchase is $19.08, which includes 6
    9·1 answer
  • Drawing 1/5 the original with a ship 14 inches
    8·1 answer
  • Josh has eight pairs of white socks, two pairs of black socks, and one pair of blue socks. Write a fraction to represent the par
    5·2 answers
  • What is the volume of the shed?
    10·2 answers
  • I have some idea about how to solve this but I am not sure <br><br> So please show your work
    5·1 answer
  • What is a valid inference? Use the drop-down menus to explain your answer. A valid inference is one that is true about the (samp
    12·1 answer
  • I have 10 minutes please help
    13·1 answer
  • The picture frames shown are both squares. The area of the larger frame is 4 times the area of the smaller frame. Find the side
    15·2 answers
  • Doing a Pre-Algebra Unit Test on Khan Academy
    8·2 answers
  • Which phrase describes the variable expression 7 divided by s?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!