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
GREYUIT [131]
3 years ago
14

Simplify 1/9 - 1/x over 1/81 - 1/x^2

Mathematics
1 answer:
cricket20 [7]3 years ago
7 0

Answer:

9x over x+9

Step-by-step explanation:

You might be interested in
Give the equation of the line through the point ( – 15, - 1) with a slope of -3/5 in slope -intercept form
shutvik [7]

Answer:

-1 = (-3/5)-15 + b

(I don't know the y-intercept bc I don't have a graphing calc but to find it out you just graph it and then see where the line passes thru the y axis)

7 0
3 years ago
Factor 7(x − 3)2 − 4(x − 3) − 3 completely.
Nezavi [6.7K]
7(x-3)^2-4(x-3)-3\\\\substitute\ t=x-3,\ then\ we\ have\\\\7t^2-4t-3\\\\a=7;\ b=-4;\ c=-3\\\\\Delta=b^2-4ac\\\\\Delta=(-4)^2-4\cdot7\cdot(-3)=16+84=100\\\\t_1=\dfrac{-b-\sqrt\Delta}{2a};\ t_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\\sqrt\Delta=\sqrt{100}=10\\\\t_1=\dfrac{-(-4)-10}{2\cdot7}=\dfrac{4-10}{14}=\dfrac{-6}{14}=-\dfrac{3}{7}\\\\t_2=\dfrac{-(-4)+10}{2\cdot7}=\dfrac{4+10}{14}=\dfrac{14}{14}=1\\\\7t^2-4t-3=7\left(t+\dfrac{3}{7}\right)(t-1)=(7t+3)(t-1)\\\\=(7(x-3)+3)(x-3-1)=(7x-21+3)(x-4)\\\\=\boxed{(7x-18)(x-4)}
7 0
3 years ago
A particle moves so that r(t) = ati + b sin atj. Show that the magnitude of the acceleration of the particle is proportional to
ValentinkaMS [17]

Answer:

Step-by-step explanation:

Given

Position of particle is r(t)=at\hat{i}+b\sin (at)\hat{j}

i.e. distance from x axis is b\sin (at)---1

Distance from y axis at

velocity is given by v=\frac{\mathrm{d} r}{\mathrm{d} t}

v=a\hat{i}+ba\cos (at)\hat{j}

Similarly acceleration is given by

a=\frac{\mathrm{d} v}{\mathrm{d} t}

a=0\hat{i}-a^2b\sin (at)\hat{j}

Magnitude of acceleration is =\sqrt{(-a^2b\sin (at))^2}

=a^2b\sin (at)----2

From 1 and 2 we can see that

Magnitude of acceleration is proportional to distance from x axis

a\propto distance\ from\ x-axis

5 0
3 years ago
Read 2 more answers
Fraz is running a science fair experiment where mice run through a maze with 4 turns. At each turn, the mouse can take a right o
kherson [118]

Answer:

the probability is 0.125

Step-by-step explanation:

The number of ways in which the mouse can move in the 4 turns is calculated using the rule of multiplication as:

<u>       2           </u>* <u>            2            </u> * <u>             2             </u>* <u>         2           </u> = 16

  1st turn              2nd turn               3rd turn               4th turn

Because the mouse can take two options at every turn, right or left.

Now, from the 16 possibilities of movements, a mouse will find an exit in just two options:

1. right-right-left-left

2. left-right-right-left

So, the probability that a mouse will find an exit is:

P=\frac{2}{16}=0.125

Because, there are 16 possibilities and a mouse will find an exit using 2 of them.

3 0
3 years ago
(BRAINLIST!!!)70 POINTS!!! ASAP Write two different expressions equivalent to 8d - 4) Use factoring for one way​
lisov135 [29]

Answer:

one is using commutative property 4d - 8

another is 2 to power of 4 - 2 to the power of 2

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • 13. which inequality has the following graphed solution?
    6·1 answer
  • the pitch, or frequency, of a vibrating string varies directly with the square root of the tension. if a string vibrates at a fr
    11·2 answers
  • Nola purchased 2.5 pounds of cheese for $10.50. Her mother purchased 3 pounds of the same cheese for $12.60. The cost of cheese
    6·2 answers
  • Y=4x^2-4x-8 using the quadratic formula
    15·1 answer
  • A local park is planning to plant new trees this spring. There will be two types of trees, elm trees and oak trees. Due to envir
    11·2 answers
  • Please help me please I need help!!!!!!!!!!!!!!!!!!!hshdjdndndbdbnfjfkfkfkdkdkfkfjdjfiid
    15·1 answer
  • B) g(-1)
    6·1 answer
  • ALGEBRA 2 <br> *need work to be shown *<br> solve the following equation x^2 + 27=-9
    8·2 answers
  • What is the circumference of a circle with a diameter of 2 feet? use 3.14 for pie
    12·2 answers
  • The difference in means is about ____ times the mean absolute deviations
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!