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
Leya [2.2K]
3 years ago
8

BASIC ALGEBRA PLZZZ HELP (x+y)(x-y)

Mathematics
2 answers:
ELEN [110]3 years ago
6 0

Answer:

x^2-y^2

Step-by-step explanation:

Given the expression (x+y)(x-y)

We can distribute this using the FOIL technique

This would leave us with

x^2+xy-xy-y^2

Then we can combine like terms to leave us with

x^2-y^2

Marizza181 [45]3 years ago
6 0

Steps:

(x+y)(x-y)

x^2-xy+xy-y^2

Multiplying the brackets together.

negative and positive= negative

= x^2-y^2

Answer is x^2-y^2

You might be interested in
Which of the following equations represents a nonlinear function?
Ainat [17]
Y=square root of x

All the others would be a straight line with an unchanging slope (meaning they're linear). Y=rootx is not linear.
I hope this Helps!
8 0
3 years ago
How to solve this pythagoras theorem
My name is Ann [436]

Answer:

see explanation

Step-by-step explanation:

The hypotenuse is the longest side thus is (4x + 1)

The legs are 2x and (4x - 1)

Using Pythagoras' theorem, then

(4x + 1)² = (2x)² + (4x - 1)² ← expanding factors

16x² + 8x + 1 = 4x²  + 16x² - 8x + 1 , that is

16x² + 8x + 1 = 20x² - 8x + 1 ( subtract 20x² - 8x + 1 from both sides )

- 4x² + 16x = 0 ( multiply through by - 1 )

4x² - 16x = 0 ← factor out 4x from each term

4x(x - 4) = 0

Equate each factor to zero and solve for x

4x = 0 ⇒ x = 0

x - 4 = 0 ⇒ x = 4

Now x > 0, thus x = 4

2x = 2(4) = 8

4x - 1 = 4(4) - 1 = 16 - 1 = 15

4x + 1 = 4(4) + 1 = 16 + 1 = 17

Thus

perimeter = 8 + 15 + 17 = 40 cm

3 0
3 years ago
Please help quick<br><br> 12 points<br><br> write the ratio 7 to 8 as a fraction decimal and percent
OLEGan [10]

Answer: 7/8  0.875 87.5%

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Write the equation of the line passing through the points (-4,-1) and (2,8)
klio [65]
<h3><u>Explanation</u><u>:</u></h3>
  • Calculate the slope with two given coordinate points by using rise over run.

m =  \frac{y_2 - y_1}{x_2 - x_1}

Let these points

\begin{cases}(x_1, y_1) = ( - 4,  - 1) \\ (x_2, y_2) = ( 2,  8) \end{cases}

m =  \frac{8 - ( - 1)}{2 - ( - 4)}  \\ m =  \frac{8 + 1}{2 + 4}  \Longrightarrow \frac{9}{6}  \Longrightarrow \frac{3}{2}  \\ m =  \frac{3}{2}

  • Slope-Intercept

y = mx + b \\ m = slope \\ b = y - intercept

Substitute the value of m in the equation.

y =  \frac{3}{2} x + b

  • Substitute any coordinate points that are given or part of the graph in the equation.

(x_, y) = ( - 4,  - 1)

- 1 =  \frac{3}{2} ( - 4) + b

  • Solve the equation for b-term.

- 1 =  \frac{3}{ \cancel{2}} ( \cancel{ - 4})   + b\\  - 1 = 3( - 2) + b \\  - 1 =  - 6 + b \\  - 1 + 6 = b \\ 5 = b

  • Rewrite the equation by substituting the value of b in the equation.

y =  \frac{3}{2} x + 5

<h3><u>Answer</u></h3>

\large \boxed{y =  \frac{3}{2} x + 5}

<em>If</em><em> </em><em>you</em><em> </em><em>have</em><em> </em><em>any</em><em> </em><em>questions</em><em> </em><em>related</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>answer</em><em>,</em><em> </em><em>feel</em><em> </em><em>free</em><em> </em><em>to</em><em> </em><em>ask</em><em> </em><em>via</em><em> </em><em>comment</em><em>.</em>

7 0
3 years ago
(2x² + 3x + 2)-( x² - 4x - 1)
Scorpion4ik [409]

Answer:69

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • 78*2345=? multiply please
    12·2 answers
  • Whats is the sum of 4x10^-5 and 3x10^-5 written in standard form?
    7·1 answer
  • Greta and Marge are collecting money for a local charity by taking donations outside of busy
    14·1 answer
  • A submarine dives 280 feet below the water surface. It then rises back up to wards the surface at 55 feet per minute for 5 minut
    8·1 answer
  • Please help me solve this problem!!
    15·1 answer
  • You are paid $8.10 an hour at your part-time job your deductions are FICA 7.65% federal tax withholding 9.35% and state tax with
    9·1 answer
  • The hypotenuse is c what are the letters of the legs?
    14·1 answer
  • a girl standing on the top of tree observed a tiger on a point of 30.95m far from bottom of the tree.find the angle of depressio
    9·1 answer
  • What would this answer be?
    12·1 answer
  • Monique worked for 435 hours and earned $39.79.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!