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
Korvikt [17]
3 years ago
10

If x+y=5,x-y=4,find the value of x²-y²​

Mathematics
1 answer:
inysia [295]3 years ago
4 0

Answer:

20

Step-by-step explanation:

→ First find the value of x and y

x + y = 5

x - y = 4

→ Add the equations to cancel out the y's

2x = 9

→ Divide both sides by 2 to find the value of x

x = 4.5

→ Substitute x = 4.5 back into x - y = 4 to find the value of y

4.5 - y = 4

→ Minus 4.5 from both sides to isolate -y

-y = -0.5

→ Multiply everything by -1

y = 0.5

→ Substitute x = 4.5 and y = 0.5 into x² - y²

4.5² - 0.5² = 20.25 - 0.25 = 20

You might be interested in
Which property is demonstrated by this equation (1+2)+3=1+(2+3)
11Alexandr11 [23.1K]
Associative property
6 0
3 years ago
Read 2 more answers
Whats 20y^2+5Y+8 its basic algebra
lilavasa [31]
Y1 = -0.125 , y2= -0.125
8 0
3 years ago
How far will a wheel with a radius of 3.5 feet travel in 500 revolutions? (Use 22/7 for tt)
storchak [24]
<span>C = 2πr
C = 2(2/7)(3.5)
= 22
Distance traveled by the wheel in one revolution is 22 feet.
Distance traveled in 500 revolutions will be: 500 x 22 = 11,000 feet.</span>
7 0
3 years ago
Describe the transformation of the graph of f into the graph of g as either a horizontal or vertical stretch.
balandron [24]
To properly visualize the given, we transform them into equation form rather than words.
                          f(x) = sqrt (x)
                          g(x) = 8(sqrt(x))
From these, it may be observed that g(x) is 8 times of f(x). These transformation is in the value of y and is scaling. Because it is multiplied by a a whole number, the transformation is vertical scaling that involves multiplying the y-coordinate by 8. 
4 0
3 years ago
The product of two numbers is 10 times the value of 8 × 7. Which expression shows the two numbers?
Aleonysh [2.5K]

Answer: 7 x 80 i think


Step-by-step explanation:\

nothing


8 0
2 years ago
Other questions:
  • HELP Round your answers to the nearest tenth. WILL GUVE BRANLIEST​
    14·1 answer
  • Kevin bought seven tickets to the Haunted Graveyard at Lake Compounce for $209.93. How much does one ticket cost?
    9·2 answers
  • Find the roots of the function g(x) = I4 – 22 – 12.
    7·1 answer
  • 48 points if you know this!
    12·1 answer
  • Solve for the variable b -1/2 ( b - 6 ) =6
    15·2 answers
  • ANSWER FOR BRAINLY AND EXPLAIN
    5·2 answers
  • Help help help help help help help help help help help help help help help help help help help help help help help help help hel
    5·2 answers
  • Solve for u.<br> 7/8-7/2u=-7/4<br> Simplify your answer as much as possible
    6·2 answers
  • What is the solution to <br> y-7 &gt; 3+ 2y
    14·1 answer
  • Can you do this because it is confusion the thing is y=mx+c
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!