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
sergey [27]
3 years ago
11

0 = -1/14 x^2 + 4x +5 I need to solve for x but I don't get it, PLEASE EXPLAIN AND HELP!!

Mathematics
1 answer:
MariettaO [177]3 years ago
5 0
Any time you have a fraction within an equation, multiply the entire equation by the denominator to clear the fraction. Since the lead term is negative, we can multiply that away as well
(-14) (0=-1/14x²+4x+5)      [now distribute]

0=x²-56x+70      [try to factor into binomials first]
Since 70 only has prime factors of 2·5·7, there is no combination which equals (-56). Use the quadratic formula, or complete the square. I'll use quadratic:

x=<u>-b+/-√(b²-4ac)</u>
            2a
a=1, b=(-56), c=70

x= <u>-(-56)+/- √((-56)²-4(1)(70)</u>
                  2(1)
x= <u>56+/- √(3136-280)
</u>               2
<u />x=<u>56+/-√(2856)</u>
             2
x=<u>56+/-√(2³·3·119)</u>
               2

x=<u>56+/-2√(714)</u>
             2

x=28+√714; x=28-√714



You might be interested in
An isosceles triangle has base angles that each measure 69o. Which equation can be used to find x, the measure of the third angl
Levart [38]

Answer:

I░░ ░░░░▄░░░░░░░░░ ▄ ░░░░░░░░▌▒█░░░░░░░░░░░▄▀▒▌ ░░░░░░░░▌▒▒█░░░░░░░░▄▀▒▒▒▐ ░░░░░░░▐▄▀▒▒▀▀▀▀▄▄▄▀▒▒▒▒▒▐ ░░░░░▄▄▀▒░▒▒▒▒▒▒▒▒▒█▒▒▄█▒▐ ░░░▄▀▒▒▒░░░▒▒▒░░░▒▒▒▀██▀▒▌ ░░▐▒▒▒▄▄▒▒▒▒░░░▒▒▒▒▒▒▒▀▄▒▒▌ ░░▌░░▌█▀▒▒▒▒▒▄▀█▄▒▒▒▒▒▒▒█▒▐ ░▐░░░▒▒▒▒▒▒▒▒▌██▀▒▒░░░▒▒▒▀▄▌ ░▌░▒▄██▄▒▒▒▒▒▒▒▒▒░░░░░░▒▒▒▒▌ ▌▒▀▐▄█▄█▌▄░▀▒▒░░░░░░░░░░▒▒▒▐ ▐▒▒▐▀▐▀▒░▄▄▒▄▒▒▒▒▒▒░▒░▒░▒▒▒▒▌ ▐▒▒▒▀▀▄▄▒▒▒▄▒▒▒▒▒▒▒▒░▒░▒░▒▒▐ ░▌▒▒▒▒▒▒▀▀▀▒▒▒▒▒▒░▒░▒░▒░▒▒▒▌ ░▐▒▒▒▒▒▒▒▒▒▒▒▒▒▒░▒░▒░▒▒▄▒▒▐ ░░▀▄▒▒▒▒▒▒▒▒▒▒▒░▒░▒░▒▄▒▒▒▒▌ ░░░░▀▄▒▒▒▒▒▒▒▒▒▒▄▄▄▀▒▒▒▒▄▀ ░░░░░░▀▄▄▄▄▄▄▀▀▀▒▒▒▒▒▄▄—

I

I

I

I

I

I

I

I_______________

4 0
3 years ago
If f(x)=x2-25and g(x)=x-5 ,what is the domain of (f/g)(x)?
djyliett [7]

Answer:

Find the domain.

Interval Notation:

(−∞,5)∪(5,∞)

Set-Builder Notation:

{x|x≠5}

3 0
3 years ago
Which is the definition of a ray?
valkas [14]

Answer:

Ray. Definition: A portion of a line which starts at a point and goes off in a particular direction to infinity. Try this Adjust the ray below by dragging an orange dot and see how the ray AB behaves. Point A is the ray's endpoint. -Google

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
how much money should I deposited today in an account that earns 5% compounded semiannually so that it will accumulate to 12,000
Nookie1986 [14]
800 or 2400 not sure which
6 0
3 years ago
Jackie deposited $315 into a bank account that earned 1.5% simple interest each year.
Brrunno [24]

Answer:

copied from InesWalston expert

Money in the bank account after 3 years will be  $329.18

Step-by-step explanation:

Jackie deposited $315 into a bank account that earned 1.5% simple interest each year for 3 year, while no money was deposited into or withdrawn from the account.

We know that,

i = p.r.t / 100

Where,

i = interest

P = Principal = $315

r = Rate of interest = 1.5% annual

t = time period = 3 years

Putting the values,

i = 315 × 1.5 × 3 / 100 = $14.18

Total money in bank account = Principal + interest = 315 + 14.18 = $329.18

3 0
3 years ago
Other questions:
  • Please explain your answer. THX!
    15·1 answer
  • what is an equation in point-slope form for the line that passes through the points (1,-2) and has a slope of 3
    15·2 answers
  • Please help out before 8pm !!
    5·1 answer
  • Please help me do this
    13·1 answer
  • 1 4/5 is an example of a (n)
    8·1 answer
  • Suppose a city with population 100,000 has been growing at a rate of ​8% per year. If this rate​ continues, find the population
    7·1 answer
  • Eugene wanted to make note cards by cutting pieces of paper in half. Before starting he got six more pieces to use. When he was
    13·2 answers
  • Supriya is decorating her bedroom. She plans to hang strings of twinkle lights all the way around her walls. She measures the wa
    12·1 answer
  • I need help asap! Thank youu
    8·1 answer
  • Which comparison is not correct?<br> 8&gt;-9<br> -7 &gt;-9<br> 10-8&lt;-4<br> -2&lt;-9
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!