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
bixtya [17]
3 years ago
8

If x2 - y2 = 12 and x - y = 4, what is the value

Mathematics
1 answer:
ira [324]3 years ago
6 0

Step-by-step explanation:

x²-y²=12

(x-y)(x+y)=12

but x-y=4

4(x+y)=12

x+y=12/4

x+y=3

lets make x the subject of the formula

x=3-y

since x-y=4

(3-y)-y=4

3-y-y=4

-2y=1

y=-1/2

then x=3-y

x=3-(-1/2)

x=(6--1)/2

x=7/2

therefore; x²+2xy+y

=(7/2)²+2×7/2×-1/2+(-1/2)

=49/4-7/2-1/2

=(49-14-2)/4

=33/4

=8.25

=8

You might be interested in
a living room wall is 13 feet long. How far from the corner would you hace to the edge of a 3ft 8in shelf for it to be centered
Sunny_sXe [5.5K]
It would be centered togethered.
8 0
3 years ago
Help and please explain so I can do it on my own. There are a couple more on this sheet.​
Andreas93 [3]

Answer:

(2, -10)

Step-by-step explanation:

so first i find the axis of symmetry using the equation x= -b/2a

in this problem

a=3

b= -12

c= 2

- (-12)/ 2(3) = 2

2 will be the x point for your vertex

you then plug in your x point into the original equation and solve for y

y = 3(2)^2 - 12(2) +2

y = -10

Vertex is then (2, -10)

8 0
3 years ago
Translate into an equation:
tatiyna
In order to do these, simply translate the sentence mathematically.
1) x-15=7
2)3x+4=13
3)x+x+2+x+4=51
Hope this helped :D. Comment below if you have any questions!
4 0
3 years ago
I need help with this
Monica [59]

Using derivatives, it is found that regarding the tangent line to the function, we have that:

  • The slope is of 962.
  • The equation of the line is y = 962x - 5119.

<h3>What is a linear function?</h3>

A linear function is modeled by:

y = mx + b

In which:

  • m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
  • b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.

The slope of the line tangent to a function f(x) at x = x' is given by f'(x'). In this problem, the function is given by:

f(x) = 5x³ + 2x + 1.

The derivative is given by:

f'(x) = 15x² + 2.

Hence the slope at x = 8 is:

m = f'(8) = 15(8)² + 2 = 962.

The line goes through the point (8,f(8)), hence:

f(8) = 5(8)³ + 2(8) + 1 = 2577.

Hence:

y = 962x + b

2577 = 962(8) + b

b = -5119.

Hence the equation is:

y = 962x - 5119.

More can be learned about tangent lines at brainly.com/question/8174665

#SPJ1

7 0
2 years ago
Please help on number 3 part 1 and part 2 pretty please thanks
Goryan [66]
For the first part you need to find 85% of 16,000. its 13,600. you get this by multiplying .85 by 16,000.

for part two, i don't know how to show the work, but 816 is 96% of 850.

sorry about that, but i hope it helps
7 0
3 years ago
Other questions:
  • What side length would you specify if you were required to create a regular hexagonal plate that was composed of 33 cm2 of sheet
    11·1 answer
  • Change to percents. 3 1/2
    14·2 answers
  • An instructor has graded 23 exam papers submitted by students in a class of 24 students, and the average so far is 67. (The maxi
    14·1 answer
  • Freeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee pointssssssssssss
    14·2 answers
  • Can someone help me on this problem i am stuck?
    12·1 answer
  • What is the unit rate for the ratio 280 student/8 buses​
    8·1 answer
  • What are the valúes of a, b, and c in quadratic equation -2x^2+4x-3=0
    15·1 answer
  • A random number generator is used to create a list of 300 single-digit numbers. Of those 300 numbers, 146 are odd
    6·2 answers
  • A store is selling a couch for $975.00 on a 24-month payment plan. If a down payment of $132.00 is given, and no instrest is cha
    8·1 answer
  • Which fraction is equal to 5/10
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!