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
Nat2105 [25]
4 years ago
9

4x2 - 6x-1 = 0 Help please

Mathematics
1 answer:
svp [43]4 years ago
4 0

Good evening

Answer:

x = (3 + √13)/4

or

x = (3 - √13)/4

Step-by-step explanation:

Firstly let’s calculate the discriminant Δ

Δ = (-6)² - 4(4)(-1) = 36 + 16 = 52 then √Δ = √52 = 2√13

then

x = (6 ± 2√13)/8

then

x = (3 ± √13)/4

__________________________

:)

You might be interested in
when a number is subtracted from 6, the result is two times five less than the number. find the number?​
Kryger [21]

Answer:

let number=x

According to given condition

6-x=x-2(5)

6-x=x-10

6+10=x+x

16=2x

16/2=x

8=x

5 0
3 years ago
Read 2 more answers
What is the volume and surface area of this pyramid?
Blizzard [7]
It is a square based pyramid where,
Length (l)=9
Height (h)=10
Slant height (s)=11

For, volume (V) = 1/3 l^2*h
=1/3 9^2*10
=1/3 *810
=270


For, surface area = 2sl
= 2*11*9
=198

3 0
3 years ago
Which number is a factor of 15 but not a multiple of 3
tester [92]
Is 5 because the factor of 15 can not be other number except 5


4 0
4 years ago
Read 2 more answers
A sports team is throwing an end-of-season party at the fitness club. The costs associated with the party include a $150 flat fe
Sedbober [7]

Answer:

    c(x)=150+16.52x

  • With x being the number of people attending the party, and c(x) the cost in dollars.

Explanation:

The <em>total cost </em>is comprised of three costs, namely<em> the flat fee for the room rental</em> ($150), <em> the charge person for the Italian buffet </em>($14 per person), and <em>the tip</em> (18% added to the cost of the food). With this you can build your equation:

Total\text{ }cost=$150+$14x+18\%\times (14x)

Where x respresents the number of people attending the party.

Convert 18% to its decimal form, which is 0.18 and simplify the equation:

      Total\text{ }cost=$150+$14x+0.18\times (14x)=150+14x+2.52x\\ \\ Total\text{ }cost=150+16.52x

Hence, calling the function c(x), it is:

           c(x)=150+16.52x, with x being the number of people attending the party, and c(x) the cost in dollars.

5 0
3 years ago
Can you simplify 38/45
yawa3891 [41]
This fraction 38/45 stays the same. Because the top number is smaller than the bottom number
8 0
3 years ago
Read 2 more answers
Other questions:
  • An artist wants to reduce the size of a drawing using a scale factor of 3:1 . The original drawing has an area of 720 square inc
    10·2 answers
  • Can you rephrase the question?
    10·1 answer
  • Describe each type of polygon in a set of pattern blocks
    14·1 answer
  • Ill i need to know is the fraction please
    11·2 answers
  • A 30-foot-long support wire for a 16-foot high streetlight runs from the top corner of a building to a point on the ground, form
    13·1 answer
  • Ajla went out for lunch and the meal cost $30. She wants to tip 18% on the cost of the meal ($30). The tax is 7.5%. What is the
    6·2 answers
  • Why is the ruler placement postulate important?
    9·2 answers
  • The time spent dancing (minutes) and the amount of calories burned can be modeled by the equation c = 5. 5t. Which table of valu
    10·2 answers
  • What’s the product of 22 and 49
    5·2 answers
  • A 2% decrease is written as<br><br> A 30% increase is written as
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!