answer.
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]
2 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]2 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]2 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
In which diagram are angles 1 and 2 vertical angles?
Solnce55 [7]

<u>Answer</u>

First diagram shows  1 and 2 vertical angles

<u>Explanation</u>

From the all four diagrams,we get the diagram first shows the vertically opposite angles.  

angle 1 and angle 2 are vertically opposite angles

vertically opposite angles are equal in measurements. when two lines are intersect each other form four angles, out of this four angles two pairs of vertically opposite  angles are there.

All other figures  angle 1 and 2 shows adjacent angles.

6 0
2 years ago
Read 2 more answers
The sum of the four angles in a rectangle is always 180 degrees true or false?
dem82 [27]
A rectangle has 4 sides
each side is a right angle
a right angle by definition is 90 degrees
90 + 90 + 90 + 90 = 360\\ or\\ 90 * 4 = 360
False
7 0
2 years ago
Read 2 more answers
John needs 13 bottles of water from the store. john can only carry 3 at a time. what's the minimum number of trips john needs to
Lostsunrise [7]
The minimum amount of trips would be 5. This is because in one trip he can only carry 3, so you would take 5 times 3. You may think it should be 4 trips, but 12 is 1 short of 13,so you would have to make one extra trip to get all 13 bottles.
4 0
2 years ago
Carmella wants to attend Bayside Community College. She'll need to have $25,000 six years from today. Carmella is wondering what
Sloan [31]
You do 25,000 divided by 6 is the answer and the remainder would be the cents.
8 0
2 years ago
Read 2 more answers
Roger Brown works for the sanitation department. He earns a salary of $721.00 biweekly. His boss gave him
liq [111]

Answer:

2249 dollars more

Step-by-step explanation:

52 weeks in one year so divide by 2 and then multiply by 721 and then take that amount and dubtract the new salary 20.995 and subtract the previous annual amount and then boom 2295 more

3 0
2 years ago
Other questions:
  • Stacy rolls a pair of six-sided fair dice. The probability that the sum of the numbers rolled is either a multiple of 3 or an ev
    6·2 answers
  • Stephanie has a homeowners insurance policy for her $355,000 home with an annual premium of $0.42 per $100 of value and a deduct
    9·2 answers
  • The lowest point in Japan is Hachiro­gata (elevation  ­4m), and the highest point is Mount Fuji (elevation 3,776  m).  What is t
    10·1 answer
  • Match each three-dimensional figure to its volume based on the given dimensions. (Assume π = 3.14.)
    11·2 answers
  • Tyler has a rectangular garden measuring 12m by 20m that he wants to split diagonally from corner to corner using a fence. How l
    10·2 answers
  • In right triangle ABC, angle A and angle B are complementary angles. The value of cos A is 9/41. What is the value of sin B?
    15·1 answer
  • Point Y is the midpoint of segment XZ. If XY = 2(3x +1) and YZ = 5x + 22, find the value of x.
    11·1 answer
  • A researcher is investigating variables that might be associated with the academic performance of high school students. She exam
    13·1 answer
  • The makers of a smartphone have received complaints that the face recognition tool often doesn't work, or takes multiple attempt
    14·1 answer
  • mcgregor is growing alfalfa on 180 acres,which is 30% of his farmland. mcgregor has how many acres of farmland?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!