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
KonstantinChe [14]
3 years ago
7

Y=x^2-2x-1 and y=-3x+5 solved algebraically

Mathematics
1 answer:
eduard3 years ago
3 0

Answer:

Step-by-step explanation:

y=x²-2x-1

and y=-3x+5

x²-2x-1=-3x+5

x²+x-6=0

x²+3x-2x-6=0

x(x+3)-2(x+3)=0

(x+3)(x-2)=0

x=-3,2

when x=-3

y=-3×-3+5=9+5=14

when x=2

y=-3×2+5=-6+5=-1

so solutions are (-3,14) and (2,-1)

You might be interested in
. <br><br> If BC = 6.5, CD = 7.8, and AD = 12.2, find AB to the nearest tenth.
Harman [31]
12.2 - 6.5 = 5.7

AB = 5.7
5 0
3 years ago
Read 2 more answers
ПОЖАЛУЙСТА ПОМОГИТЕ РЕШИТЬ ДАЮ 23 ОЧКА!!!
posledela

(Простите, пожалуйста, мой английский. Русский не мой родной язык. Надеюсь, у вас есть способ перевести это решение. Если нет, возможно, прилагаемое изображение объяснит достаточно.)

Use the shell method. Each shell has a height of 3 - 3/4 <em>y</em> ², radius <em>y</em>, and thickness ∆<em>y</em>, thus contributing an area of 2<em>π</em> <em>y</em> (3 - 3/4 <em>y</em> ²). The total volume of the solid is going to be the sum of infinitely many such shells with 0 ≤ <em>y</em> ≤ 2, thus given by the integral

\displaystyle 2\pi \int_0^2 y \left(3-\frac34 y^2\right) \,\mathrm dy = 2\pi \left(\frac32 y^2 - \frac3{16} y^4\right)\bigg|_0^2 = 6\pi

Or use the disk method. (In the attachment, assume the height is very small.) Each disk has a radius of √(4/3 <em>x</em>), thus contributing an area of <em>π</em> (√(4/3 <em>x</em>))² = 4<em>π</em>/3 <em>x</em>. The total volume of the solid is the sum of infinitely many such disks with 0 ≤ <em>x</em> ≤ 3, or by the integral

\displaystyle \pi \int_0^3 \left(\sqrt{\frac43x}\right)^2 \,\mathrm dx = \frac{2\pi}3 x^2\bigg|_0^3 = 6\pi

Using either method, the volume is 6<em>π</em> ≈ 18,85. I do not know why your textbook gives a solution of 90,43. Perhaps I've misunderstood what it is you're supposed to calculate? On the other hand, textbooks are known to have typographical errors from time to time...

8 0
3 years ago
A square dancing contest has 256 teams of 3 pairs each. How many dancers are participating in the contest?
stiv31 [10]

Answer:

that will be 768!!!

Step-by-step explanation:

4 0
3 years ago
The table shows the length of four tracks on an album and the total number of beats in that song.
swat32

Track 1, Track 3, Track 2, Track 4

3 0
3 years ago
At what point on the graph of y=2e^X -1 is the tangent line parallel to the line y= 5x -1
IgorLugansk [536]
Paralell has same slope
y=mx+b
m=slope
y=5x-1
when is the slope 5?

take the derivitive of 2e^x
f'(2e^x)=2f'(e^x)=2e^x

that is the slope
5=2e^x
divide both sides by 2
2.5=e^x
take the ln of both sides
ln2.5=x

when x=ln2.5 they are paralell
5 0
3 years ago
Other questions:
  • A redundant constraint is one that: has a zero coefficient for at least one decision variable.
    6·1 answer
  • The domain of the function given below is the set of all real numbers true or false; f(x)=(1/2)^x
    13·2 answers
  • B) Three times a number minus 4 is four times the number plus 1. What is the number?
    9·1 answer
  • How would you write 3.5 x 10^5 in standard form ?
    14·1 answer
  • 2. Write (2+5i)(3-1) as a complex number in standard form a+bi.<br> real part + imaginary part
    8·1 answer
  • Is this right PLEASE HELP ILL GIVE BRAINLY
    12·1 answer
  • Directions:
    15·1 answer
  • The ant teaches us a lesson about:<br> A. mischievousness<br> B. lying<br> C. pride<br> D. laziness
    8·2 answers
  • What is2/3b - 1/4b? Please help- also has to be simplified
    14·2 answers
  • Is there a more useful way to display this informa 1-1. BIRTHDAY BONANZA About 18,000,000 people on Earth share your birth date
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!