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
vlada-n [284]
3 years ago
10

Solve for x.

Mathematics
1 answer:
Masteriza [31]3 years ago
7 0

Answer:

x = 2.5 or -0.8

Step-by-step explanation:

Here, we are to use completing the square method to solve for the values of x

Firstly, we divide through by 4

= x^2 -7/4x -2 = 0

Now, we move the two term to the right hand side

x^2 -7/4x = 2

Now, we divide the coefficient of x by 2 and square it;

That would be;

(-7/4 * 1/2)^2 = 49/64

we now add this value to both sides of the equation

x^2 -7/4x + 49/64 = 2 + 49/64

The right hand side can be rewritten as;

(x-7/8)^2 = 177/64

taking the square root of both sides

x-7/8 = √(177/64)

x = 7/8 ± √(177/64)

x = 7/8 + √(177/74) or 7/8 - √(177/64)

= x = 2.53802 or -0.788017

Which to the nearest tenth is

x = 2.5 or -0.8

You might be interested in
On a coordinate plane, the coordinates of vertices R and T for a polygon are R(−6, 2) and T(1, 2). What is the length of Side RT
andriy [413]
Answer : 7 units

There are two ways you can solve this problem:

1st way - Subtract the T's x coordinate by r's x coordinate.

1-(-6) = 1+6 = 7

2nd way - Graph the points than count the units between them.

[
I attached a picture, I graphed ur points]


8 0
3 years ago
Read 2 more answers
Combine like terms to simplify the expression below:<br> 14x - (2x -y) -y STEP BY STEP PLEASE
dimulka [17.4K]
14x - (2x - y) - y
14x + (-1(2x - y)) - y
14x + (-1(2x) - 1(-y)) - y
14x + (-2x + y) - y
14x + 1(-2x + y) - y
14x + 1(-2x) + 1(y) - y
14x - 2x + y - y
14x - 2x
12x
8 0
3 years ago
Read 2 more answers
Which board geometrically represents 4x2 – 1 using algebra tiles? An algebra tile configuration showing only the product spot, w
NemiM [27]

An algebra tile configuration shows only the product spot, which has 9 tiles in 3 columns with 3 rows. First row: 2 + x squared, 1 + x. Second row: 2 + x squared, 1 + x. Third row: 2 negative x, 1 negative.

The correct option is B.

Given

Equation; \rm 4x^2 - 1

<h3>Quadratic equation</h3>

It is a polynomial that is equal to zero.

Polynomial of variable power 2, 1, and 0 terms are there.

Any equation having one term in which the power of the variable is a maximum of 2 then it is called a quadratic equation.

4x² -1 = 0 is a quadratic equation.

An algebra tile configuration showing only the product spot, which has 9 tiles in 3 columns with 3 rows. First row: 2 + x squared, 1 + x. Second row: 2 + x squared, 1 + x. Third row: 2 negative x, 1 negative.

Then,

The factors of the polynomial is;

\rm 4x^2 - 1=0\\\\ 4x^2-2x+2x-1=0\\\\ 2x(2x-1)+1(2x-1)=0\\\\(2x-1)(2x+1)=0

Hence, an algebra tile configuration shows only the product spot, which has 9 tiles in 3 columns with 3 rows. First row: 2 + x squared, 1 + x. Second row: 2 + x squared, 1 + x. Third row: 2 negative x, 1 negative.

More about the quadratic equation link is given below.

brainly.com/question/2263981

7 0
3 years ago
State the difference between a bar graph and a histogram.
Lostsunrise [7]

Answer:

<em><u>Histograms are used to represent a frequency distribution, and bar graph show a comparison between data/variables. Histograms display quantitative data with ranges of the data grouped into bins, whereas bar graphs show categorical data.</u></em>

Step-by-step explanation:

<h3><em><u>i </u></em><em><u>hope</u></em><em><u> </u></em><em><u>it's</u></em><em><u> helpful</u></em><em><u> for</u></em><em><u> you</u></em><em><u> ✌️</u></em></h3>
3 0
3 years ago
Answers to 1-6 please :)
nikitadnepr [17]
Question 1:
Perimeter = 18ft
area = 15ft²
Question 2:
Perimeter = 11m
Area = 7.5m²
4 0
4 years ago
Other questions:
  • Algebra 2 unit 5 please help
    6·1 answer
  • In ABC, the angle bisectors meet at point D. Point E is on AC, DE and is perpendicular to AC . Point F is the location where the
    13·2 answers
  • 4y^2+7y-14<br>factor by grouping ​
    7·1 answer
  • Help asap please!! 50 points and BRAINLIEST!!! Thank you!!
    12·1 answer
  • rectangle has a length that is 5 inches greater than its width, and its area is 104 square inches. The equation (x + 5)x = 104 r
    7·1 answer
  • Por que necesitamos los modelos Matemáticos
    10·2 answers
  • Help me please ! I’ll mark you brainly
    5·2 answers
  • A cashier checks the price of a kitchen table that is marked $51, because it usually rings up at $86. What percentage is the dis
    8·1 answer
  • HELP PLEASE ITS URGENT!!
    15·1 answer
  • What is the sum of the 1st square number and the 11th square number?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!