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
sveta [45]
3 years ago
13

Find the product: (x+9)(x-9) a 18 b. -81 C. - 18 d. x-64

Mathematics
2 answers:
Lilit [14]3 years ago
5 0

Answer:

x^2 -81

Step-by-step explanation:

(x+9)(x-9)

FOIL

first x*x = x^2

outer -9x

inner 9x

last -9*9 = -81

Add them together

x^2 -9x+9x -81

Combine like terms

x^2 -81

olga nikolaevna [1]3 years ago
4 0

Answer: B

Step-by-step explanation:

Simply using (a-b)(a+b)=a^2-b^2.

Evaluate the power (9^2).

x^2 - 81

You might be interested in
Anyone has an answer to this question?
mylen [45]

Answer:

1/100 cos100⁰ 100 0.1 tan100⁰

8 0
2 years ago
What is 34342424×453?
zloy xaker [14]

Answer:

1.555711807*10^10

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Find the values of the six trigonometric functions of an angle in standard position if the point with coordinates (6,-5) lies on
Tom [10]
C i guesss because you just said it
4 0
3 years ago
49 - 3 + 9 times 8 divided by 2
irinina [24]

Answer:

82

Step-by-step explanation:

49 - 3 + 9 times 8 divided by 2

6 0
3 years ago
Read 2 more answers
A right rectangular prism has edges of 2 1/4 in, 1 1/2 in and 1 1/2 in. How many cubes with lengths of 1/4 in would be needed to
Zielflug [23.3K]

The volume of a rectangular prism is (length) x (width) x (height).

The volume of the big one is  (2.25) x (1.5) x (1.5) = <em>5.0625 cubic inches</em>.

The volume of the little one is  (0.25)x(0.25)x(0.25)= 0.015625 cubic inch

The number of little ones needed to fill the big one is

             (Volume of the big one)  divided by (volume of the little one) .

       5.0625 / 0.015625  =  <em>324 tiny cubies</em>

=================================================

Doing it with fractions instead of decimals:

The volume of a rectangular prism is (length) x (width) x (height).
Dimensions of the big one are:

   2-1/4  =  9/4
   1-1/2  =  3/2
   1-1/2  =  3/2

   Volume = (9/4) x (3/2) x (3/2) =
 
                 (9 x 3 x 3) / (4 x 2 x 2)  =

                           81 / 16  cubic inches.

          As a mixed number:    81/16  =  <em>5-1/16 cubic inches</em>

Volume of the tiny cubie = (1/4) x (1/4) x (1/4) =  1/64 cubic inch.   

The number of little ones needed to fill the big one is

             (Volume of the big one)  divided by (volume of the little one) .

                 (81/16) divided by (1/64)  = 

                     (81/16) times (64/1)  = 

                             5,184/16  =  <em>324 tiny cubies</em>.


5 0
3 years ago
Other questions:
  • PLEASE HELP
    11·1 answer
  • Given the binomials (x + 1), (x + 4), (x - 5), and (x - 2), which one is a factor of f(x) = 3x^3 - 12x^2 - 4x - 55?
    15·1 answer
  • Can derivatives be used to measure the the slope of the tangent line at x=a
    5·1 answer
  • Choose the family of distributions that best fits the described situation: You want to model the number of lines of code run unt
    15·1 answer
  • In the bull's-eye shown above, /, and /. Calculate the area of the red ring of the bull's-eye.
    13·1 answer
  • A ball is thrown in air and it’s height, h(t) in feet, at any time, t in seconds, is represented by the equation h(t) =-t^2+7t.
    6·1 answer
  • A.If you deposit $10 into an empty bank account, and then withdraw $10 from the account, how much money is left in the account?
    10·1 answer
  • What is the value of x in trapezoid ABCD?<br> x=15<br> x=20<br> x=45<br> X=60
    15·2 answers
  • Calculate circumstance of the circle. Use =3.14
    13·2 answers
  • Please help no links please(01.05 MC)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!