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
Dafna1 [17]
4 years ago
13

If 2.5 is a root of the equation 2x^2+5x−q=0, what are the possible values of q?

Mathematics
2 answers:
bulgar [2K]4 years ago
4 0

Answer:

q = -2510 +5 = \pm \sqrt{5^2-4*2*q} \\ 225 = 25-8q \\\\8q = -200 \rightarrow q = -\frac {200}8 = -25

Step-by-step explanation:

Grab the generic solution of the equation. \frac 52 = \frac{-5 \pm \sqrt{5^2-4*2*q}}{2*2}. Let's isolate the radical, and square both sides.10 +5 = \pm \sqrt{5^2-4*2*q} \\ 225 = 25-8q \\\\8q = -200 \rightarrow q = -\frac {200}8 = -25

oksano4ka [1.4K]4 years ago
4 0

Answer:

since we know that x1=2.5

we can just just use vieta's theorem

x1+x2=-b/a

x1*x2=c/a

You might be interested in
. PLEASE THIS IS A BIG TEST HELP FAST
k0ka [10]
3 7/8 because looking at the ruler, the line is 7 of the 8. hope that’s helps!
8 0
2 years ago
I need to find the product help
Licemer1 [7]
I'm assuming you mean

2\times\frac{17}{10}

Write the 2 as a fraction 2/1 and multiply.

\frac{2}{1}\times\frac{17}{10}=\frac{34}{10}=\frac{17}{5}


7 0
3 years ago
The table below shows the typical hours worked by employees at a company. A salaried employee makes $67,000 per year. Hourly emp
nadezda [96]
First, we must calculate the weekly pay of an employee that is paid a fixed amount. Given that there are 52 weeks in a year, the weekly pay for a regularly paid employee is: 67,000 / 52 = $1,288.46 Now, we calculate the number of hours an employee that is paid hourly works per week: 0 + 10 + 8 + 8 + 7 + 6.5 + 4.5 = 44 So this employee is paid: 25 x 40 + 37.5 x 4 = $1,150 Therefore, it is recommended that a new employee goes for the salaried pay since the weekly earnings are greater in this option. The answer is C<span>.</span>
7 0
3 years ago
Read 2 more answers
What's the formula used to find the area of a hexagon
iren [92.7K]
One of the easiest methods that can be used to find the area of a polygon is to split the figure into triangles
8 0
3 years ago
Read 2 more answers
Solve. x 2 −5x−8=0 x2−5x−8=0 Enter your answers, as exact values, in the boxes. x = or x =
Sidana [21]

Answer:

x2-5x-8=0  

Step-by-step explanation:

Two solutions were found :

x =(5-√57)/2=-1.275

x =(5+√57)/2= 6.275

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "x2"   was replaced by   "x^2".  

Step by step solution :

Step  1  :

Trying to factor by splitting the middle term

1.1     Factoring  x2-5x-8  

The first term is,  x2  its coefficient is  1 .

The middle term is,  -5x  its coefficient is  -5 .

The last term, "the constant", is  -8  

Step-1 : Multiply the coefficient of the first term by the constant   1 • -8 = -8  

Step-2 : Find two factors of  -8  whose sum equals the coefficient of the middle term, which is   -5 .

    -8 + 1 = -7  

    -4+  2 = -2  

    -2+  4 = 2  

    -1 +   8 = 7  

5 0
3 years ago
Read 2 more answers
Other questions:
  • How do you simplify number fractions
    6·2 answers
  • Determine whether each pair of figures is similar. Justify your answer. DEF is not similar to BAC . Corresponding angles are not
    6·1 answer
  • Find the value of x in the triangle shown below.<br> please help me
    10·1 answer
  • Write an equation for a circle with a diameter that has endpointsat (-4, -7) and (-2 ,-5)
    13·1 answer
  • Write a as the subject of the formula s =n (a + l).please help me ​
    6·2 answers
  • What should be added to x2 +xy+y2 to obtain 3x2 - 4xy - y2​
    11·1 answer
  • Please check answer!
    13·1 answer
  • Why did 1/5 get a massage?because it was...
    8·1 answer
  • Which is a unit rate?<br> Please help me
    9·2 answers
  • Which sport is the most popular in<br> the word?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!