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
Bogdan [553]
3 years ago
15

Using the quadratic formula to solve 7x2 – x = 7, what are the values of x?

Mathematics
2 answers:
lesya692 [45]3 years ago
7 0

Answer:c

Step-by-step explanation:

Kruka [31]3 years ago
5 0
How the quadratic formula works:

For any quadratic equation ax² + bx + c = 0, the solution is x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.

In the case of our equation 7x² - x = 7, first we need to subtract 7 from each side so that we have 0 on the right.
7x² - x - 7 = 0

Identify the values of a, b, and c.
a = 7, b = -1, and c = -7.

Plug these into our quadratic formula and solve.

x=\frac{-(-1)\pm\sqrt{(-1)^2-4(7)(-7)}}{2(7)}=\boxed{\frac{1\pm\sqrt{197}}{14}

There are two values for x: (1+√197)/14 and (1-√197)/14.
The approximate values for these are 1.073976 and -0.931119.
You might be interested in
What is the tenth term in the sequence 9, 13, 17, 21, 25…?
Zinaida [17]

Answer:

45

Step-by-step explanation:

9, 13, 17, 21, 25

We are adding 4 each time

9+4 = 13

13+4 =17

17+4 = 21

The common difference =4

a1 = 9

The formula is

an = a1+d(n-1) where n is the term number

an = 9+4(n-1)

We want the 10th term

a10 = 9+4(10-1)

     = 9+4(9)

    = 9+36

   = 45

6 0
3 years ago
According to an article in Marketing News, fewer checks are being written at the grocery store checkout than in the past. To det
garik1379 [7]
I dont know man...im tryna answer questions so i can ask mine :(
4 0
3 years ago
At 2:00 p.m. two cars start toward each other from towns that are 240 miles apart. The rate of one car is 15 mph faster than the
Vesnalui [34]

Hello! :)

The <u>answer</u> is x+15!

~Hope it helps!~ :)

3 0
3 years ago
Find equations for those tangent lines to<br> the graph of<br> y = x − 3/x
pychu [463]

Step-by-step explanation:

y=X -3/X

y=X/1 -3/x

y= 2x -3/x

y*X= 2x-3

y*X/2 = x-3

7 0
3 years ago
Consider the graph of the function.
Zina [86]
Answer:B

looks like it has asymptotes but doesnt actually
6 0
2 years ago
Other questions:
  • What are the mental math steps to find 7(42)
    12·1 answer
  • How can i simplify the expression 8m+7m
    14·2 answers
  • An alligator is 6.6feet how long is his tail
    7·1 answer
  • -2x+3y=-6 in slope form
    12·2 answers
  • What is the sum of the first 60 positive integers?. (Points : 1). 60. . 61. . 1800. . 1830
    12·1 answer
  • Find the y-intercept of the line on the graph
    6·2 answers
  • <img src="https://tex.z-dn.net/?f=3x-4%3D14%5C%5C" id="TexFormula1" title="3x-4=14\\" alt="3x-4=14\\" align="absmiddle" class="l
    14·2 answers
  • 4x+3−2x=15<br> what is x?
    10·2 answers
  • Larry Mitchell invested part of his $25,000 advance at 2% annual simple interest and the rest at 3% annual simple interest. If h
    6·1 answer
  • Put the following numbers on a number line. 2, -2, 0, 4, -5
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!