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
aliina [53]
2 years ago
9

Name 8 Polygons And list the number Of sides

Mathematics
2 answers:
nadezda [96]2 years ago
8 0
Rectangle= 4 sides 
Trapezoid= 4 sides
Triangle= 3 sides 
hexagon= 6 sides
octagon= 8 sides
polyhedron-=10 sides i believe 


atroni [7]2 years ago
8 0
A polygon is any shape with at least 3 straight sides and angles.
-triangle, 3 sides
-square, 4 sides
-pentagon, 5 sides
-hexagon, 6 sides
-heptagon, 7 sides
-octagon, 8 sides
-nonagon, 9 sides
-decagon, 10 sides

 here are two more:
-parallelogram, 4 sides
-rectangle, 4 sides

You might be interested in
A toxic radioactive substance with a density of 9 milligrams per square centimeter is detected in the ventilating ducts of a nuc
Nutka1998 [239]
<span>60.5 milligrams per square centimeter First, determine how many half lives have expired by dividing the time by the half-life. So: 55/20 = 2.75 That means that only 2^(-2.75) = 0.148650889 = 14.8650889% of the original substance remains. So just divide the amount remaining by 0.148650889 to get the original amount. 9 / 0.148650889 = 60.5445419 So originally, there was 60.5 milligrams per square centimeter 55 years ago.</span>
5 0
3 years ago
Read 2 more answers
If f(n)= n²-n, then f(-4) is<br> O-20<br> 12<br> -12<br> 20
vagabundo [1.1K]

Answer: 20

Step-by-step explanation:

f(-4) = -4² - (-4)

f(-4) = 16 + 4

f(-4) = 20

4 0
1 year ago
For the following linear system, put the augmented coefficient matrix into reduced row-echelon form.
Anni [7]

Answer:

The reduced row-echelon form of the linear system is \left[\begin{array}{cccc}1&0&-5&0\\0&1&3&0\\0&0&0&1\end{array}\right]

Step-by-step explanation:

We will solve the original system of linear equations by performing a sequence of the following elementary row operations on the augmented matrix:

  1. Interchange two rows
  2. Multiply one row by a nonzero number
  3. Add a multiple of one row to a different row

To find the reduced row-echelon form of this augmented matrix

\left[\begin{array}{cccc}2&3&-1&14\\1&2&1&4\\5&9&2&7\end{array}\right]

You need to follow these steps:

  • Divide row 1 by 2 \left(R_1=\frac{R_1}{2}\right)

\left[\begin{array}{cccc}1&3/2&-1/2&7\\1&2&1&4\\5&9&2&7\end{array}\right]

  • Subtract row 1 from row 2 \left(R_2=R_2-R_1\right)

\left[\begin{array}{cccc}1&3/2&-1/2&7\\0&1/2&3/2&-3\\5&9&2&7\end{array}\right]

  • Subtract row 1 multiplied by 5 from row 3 \left(R_3=R_3-\left(5\right)R_1\right)

\left[\begin{array}{cccc}1&3/2&-1/2&7\\0&1/2&3/2&-3\\0&3/9&9/2&-28\end{array}\right]

  • Subtract row 2 multiplied by 3 from row 1 \left(R_1=R_1-\left(3\right)R_2\right)

\left[\begin{array}{cccc}1&0&-5&16\\0&1/2&3/2&-3\\0&3/9&9/2&-28\end{array}\right]

  • Subtract row 2 multiplied by 3 from row 3 \left(R_3=R_3-\left(3\right)R_2\right)

\left[\begin{array}{cccc}1&0&-5&16\\0&1/2&3/2&-3\\0&0&0&-19\end{array}\right]

  • Multiply row 2 by 2 \left(R_2=\left(2\right)R_2\right)

\left[\begin{array}{cccc}1&0&-5&16\\0&2&3&-6\\0&0&0&-19\end{array}\right]

  • Divide row 3 by −19 \left(R_3=\frac{R_3}{-19}\right)

\left[\begin{array}{cccc}1&0&-5&16\\0&2&3&-6\\0&0&0&1\end{array}\right]

  • Subtract row 3 multiplied by 16 from row 1 \left(R_1=R_1-\left(16\right)R_3\right)

\left[\begin{array}{cccc}1&0&-5&0\\0&1&3&-6\\0&0&0&1\end{array}\right]

  • Add row 3 multiplied by 6 to row 2 \left(R_2=R_2+\left(6\right)R_3\right)

\left[\begin{array}{cccc}1&0&-5&0\\0&1&3&0\\0&0&0&1\end{array}\right]

8 0
3 years ago
if a 6 ft tall tent cast a 10 ft long shadow the how long is the shadow that a 9 ft tall adult elephant casts? show work
olya-2409 [2.1K]
15ft

6/10 • 9/x

Cross multiply.

9•10=90
90/6=15
5 0
2 years ago
Read 2 more answers
Complete the equation of the line through (2, -2) and (4,1)
Ann [662]

Answer:

y = 3/2x - 5

Step-by-step explanation:

To find the equation of the line

Step 1: find slope

( 2 , -2) ( 4 , 1)

x_1 = 2

y_1 = -2

x_2 = 4

y_2 = 1

Insert the values into

m = (y_2 - y_1) / (x_2 - x_1)

m = ( 1 - (-2) / (4 - 2)

= ( 1 + 2) / ( 4 -2 )

= 3 / 2

m = 3/2

Step 2: substitute m into the equation

y = mx + c

y = 3/2x + c

Step 3: substitute any of the two points into the equation

Let's pick (4 , 1)

x = 4

y = 1

y = 3/2x + c

1 = 3/2(4) + c

1 = 3*4/2 + c

1 = 12/2 + c

1 = 6 + c

1 - 6 = c

c = 1 - 6

c = -5

Step 4 : substitute c into the equation

y = 3/2x + c

y = 3/2x - 5

The equation of the line is

y = 3/2x - 5

3 0
3 years ago
Other questions:
  • Irrational numbers are _____ integers.
    11·1 answer
  • During a construction project, heavy rain filled construction cones with water. The diameter of a cone is 12 in. and the height
    5·1 answer
  • What are the possible damages for a rectangle with 12 ft.²
    8·1 answer
  • Solve for "y" 1.2x-4y=28
    5·1 answer
  • jill is making a quilt in the shape of a right triangle. the measurement of the diagonal of the quilt is 36 inches long. the wid
    13·1 answer
  • A highway measuring 90 feet x 7 feet requires 1/2 a fluid ounce of cleaning situation per square root how much cleaning situatio
    6·1 answer
  • What is the difference in the = between (1, 7) and (3, 11)? What is half that difference?
    10·1 answer
  • The sum of 7 and 3 times a number is 34.<br> What is the number?
    14·1 answer
  • 2. Find the length of the midsegment AB.<br><br> 7<br> 10.5<br> 21<br> 30
    6·2 answers
  • Question 4 (1 point)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!