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
padilas [110]
3 years ago
15

Solve 5x^2+2x=1 using either factoring, square root method, completing the square or quadratic formula.

Mathematics
1 answer:
wolverine [178]3 years ago
4 0

Answer:

x = -1 ± √6 / 5

Step-by-step explanation:

Solve 5x^{2} + 2x = 1

move 1 to the left side of the equation by subtracting it from both sides.

5x^{2} + 2x - 1 = 0

Use the quadratic formula to find the solutions.

-b± \sqrt{b^2 - 4 (ac)}/ 2a

Substitute the values a = 5 , b = 2, and c = -1 into the quadratic formula and solve for x

-2±\sqrt{2^2 - 4(5 - 1)}/ 2 ⋅ 5

Simplify.

x = -2 ± 2 \sqrt{6}/ 10

x = -1 ± \sqrt{6}/ 5

Exact Form:

x = -1 ± \sqrt{6}/ 5

You might be interested in
What is the interquartile range for this data set? 9, 17, 3, 26, 9, 15, 7, 20, 5, 12, 22
stepan [7]
23 because you subtract your highest number with your lowest number
4 0
2 years ago
Read 2 more answers
The number of candies consumed varies inversely with the number of children present. When 12 children are present,140 pieces of
irinina [24]
Loosely, "varies inversely" means that as one quantity increases, the other decreases. Specifically, if x and y vary inversely, then y = k/x where k is some constant (a particular number).

Another way to write that relationship is xy = k.  To find the value of k for this problem, you need a numbers for x and y that go together.

Suppose x = number of children and y = number of candies (it doesn't matter what order these go in as long as you keep track!).

"When 12 children are present, 140 pieces of candy are consumed."  So when x = 12, the value of y = 140.

xy = k
(12)(140) = k
1680 = k

Now, when x = 8 children,

8y = 1680
y = 210

5 0
3 years ago
Read 2 more answers
Yo 9th grade algebra 2 just answer the bottom row i did the rest by myself.
lilavasa [31]

Answer:

5. (x-8)(x+2)

10. (x-5)(x-5) OR (x-5)^2

6 0
3 years ago
Simplify the expression 10-4x(6+5-1) divided by 8+7
Eddi Din [679]
Simple,

writing out the problem...

\frac{10-4x(6+5-1)}{15}

Simplify it...

-4x(6+5-1)

-4x(11-1)

-4x(10)

-40x

Making it look like...

\frac{10-40x}{15}

Cancel out the common factors...

Thus making the answer:

- \frac{2(4x-1)}{3}.

8 0
3 years ago
What number is one thousand more than 6,861
Lera25 [3.4K]

The answer is

7,861.


4 0
3 years ago
Read 2 more answers
Other questions:
  • The volume of a cylinder is V = 1/3 πr2h. If the radius is doubled and the height is halved, what will be the ratio of the new v
    8·2 answers
  • 5+2-9-4+7 <br> I know to use pemdas but I get two different answers
    8·1 answer
  • Plz help this is an evil question
    14·2 answers
  • What is two zero two four
    5·2 answers
  • What is the reason for the fourth and eight steps in the proof?
    10·1 answer
  • Thx for helping good luck
    15·1 answer
  • An equation of a circle is given as (x + 6)² + (y − 7)² = 81. Find the center and radius of the circle. Show all work to receive
    13·1 answer
  • How many points does it take to determine a plane ?
    5·1 answer
  • If f(x) = 3x + 10 and g(x) = 2x - 4, find (f+ g)(x).
    7·1 answer
  • How many solutions does the equation 2(9x-6)=18x+2 have??? Please help
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!