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
Aliun [14]
3 years ago
14

What is the answer to −9 ×(−8)

Mathematics
1 answer:
klio [65]3 years ago
3 0

Answer:

-9x(-8)

9x8

=72

Step-by-step explanation:

You might be interested in
Find the area of the figure. Round to the nearest tenth if necessary.
r-ruslan [8.4K]
Area =  area of rectangle - area of 2 hemispheres
         = 24 * 32 - pi * 12^2
         = 315.6  sq units
5 0
3 years ago
Two planes left simultaneously from the same airport and headed in the same direction towards another airport 3600 km away. The
Wewaii [24]

answer:133.3km

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The base of a prism has n sides. Find the numbers of faces, edges, and
Harman [31]

Answers:

  • faces = n+2
  • edges = 3n
  • vertices = 2n

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

Explanation:

Think of a hexagonal room with n = 6 walls, i.e. the floor is a hexagon with n = 6 sides. The floor and ceiling are parallel to each other, and congruent hexagons. That's 2 faces so far. Then we have another 6 faces to account for the walls. This gives 2+6 = 8 faces of a hexagonal prism.

In more general terms, a prism with a base of n sides will have 2 parallel and congruent base faces, and n walls or lateral faces. This gives n+2 total faces.

------------------------

Let's go back to the hexagonal prism. The floor has 6 sides to it, and so does the ceiling. We have 6+6 = 12 edges so far. Then we have another 6 edges where each of the rectangular walls meet up. That gives 12+6 = 18 edges total of this hexagonal prism room.

For any more general case, each base has n sides. That gives 2n sides so far for just the bases. Then add on another n for the lateral edges and we get 3n total edges.

--------------------------

Once again lets revisit the room with the hexagonal floor and ceiling. The floor has 6 vertices and the ceiling has the same vertex count. Therefore, this prism has 6+6 = 12 vertices.

For the general case, each base has n vertices. There are 2 such identical bases giving 2n vertices total.

---------------------------

One way to check the answer:

We could use Euler's Polyhedron Formula which is

F+V-E = 2

where,

  • F = number of faces
  • V = number of vertices
  • E = number of edges

For the hexagonal prism we found

  • F = 8
  • V = 12
  • E = 18

Then notice how

F+V-E = 2

8+12-18 = 2

20-18 = 2

2 = 2

This confirms the formula works for a hexagonal prism.

Now let's check it for the more general case

We found earlier that,

  • F = n+2
  • V = 2n
  • E = 3n

So,

F+V-E = 2

n+2+2n-3n = 2

3n-3n+2 = 2

0n+2 = 2

0+2 = 2

2 = 2

This helps confirm the answer for any prism with the base of n sides.

4 0
2 years ago
Mr.gomez’ cherry tree grew 12 inches in 3/4 of a year. At that rate how much would it grow in 1 year
Karolina [17]

12/3=4

4 inches per 1/4 of the year.

4x4=16

Therefore it would grow 16 inches in an year.

7 0
3 years ago
Jenny wants to paint the ceiling of her restaurant. the ceiling is in the shape of a square. its side lengths are 44 feet. suppo
inysia [295]
First we need to find the square footage of her ceiling, since it's a square just multiply the side by the side: 44•44=1936. Now divide the square feet by how many feet each can can paint: 1936/242=8. Jenny would need exactly 8 cans of paint to paint her ceiling :)
8 0
4 years ago
Other questions:
  • Explain why triangle abc is similar to triangle ade.
    5·1 answer
  • Which angles are coterminal with 3pi/2?
    6·2 answers
  • The sum of two consecutive numbers is 31. Let x = the smaller number. Which let statement would you use for the larger number?
    5·1 answer
  • If you divide any number by itself , what is the result?
    5·2 answers
  • What is the midpoint of a line segment at the origin (0,0) and its end points at (-5,-12)
    12·1 answer
  • Find the volume, thanks
    15·2 answers
  • A basketball player has 45 steals, 72 assists, 90 rebounds, and 432 points. What is
    8·1 answer
  • What are 3 expressions of 3/4x=15
    10·1 answer
  • If f(x)=2x²-x find f(-3)
    13·2 answers
  • Lalasa and Yasmin are designing a triangular banner to hang in the school gymnasium. They first draw the design on paper. The tr
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!