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
snow_lady [41]
3 years ago
12

A polyhedron has 7 faces and 10 vertices. How many edges does it have

Mathematics
1 answer:
Serjik [45]3 years ago
5 0
EULER'S \: \: \: FORMULA \: - \\ \\ \\ For \: any \: convex \: polyhedron \: , \: the \: \\ number \: of \: vertices \: and \: faces \: \\ together \: is \: exactly \: two \: more \: than \\ \: the \: number \: of \: edges. \: \\ \\ Symbolically \: , \\ V-E+F=2 \\ \\ Here \: , \: F=7 \: \: and \: \: V=10 \\ \\ We've \: \: to \: \: find \: \: E \\  Using \: \: Euler's \: \: Formula \: \: , \\ \\ 10 - E + 7 = 2 \\ \\ \\ E \: = \: 15 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: Ans.
You might be interested in
Write an equation of the line passing through the point (-6,-7)with slope=4.
MAVERICK [17]
And how would I do that via computer? If this is homework, do it your self, it's not that hard. Draw it and scan it (man computer doesn't have the ability to scan things)
5 0
3 years ago
Read 2 more answers
the ages of three siblings total 32 years the middle child is 4 years older than the youngest and the eldest is twice as old as
krek1111 [17]

Answer: 5 9 18. The youngest child would be 5, the middle child would be 9, and the eldest would be 18 years old.


Step-by-step explanation: 5 + 4 = 9, 9(2) = 18 Hope this helps :D


4 0
3 years ago
Help- and also show the work please-
svetlana [45]

A fraction is a way to describe a part of a whole.  The correct option is C.

<h3>What is a Fraction?</h3>

A fraction is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25.

A proper fraction is a fraction whose numerator is smaller than the denominator. When a proper fraction is raised to a positive exponent greater than 1, then the product decreases but does not reach 0.

Hence, the correct option is C.

Learn more about Fraction:

brainly.com/question/1301963

#SPJ1

8 0
1 year ago
A red ant travels 9/8 inches in 3/4 minutes and 3 3/8 inches in 2 1/4 minutes what is the ants speed in inches per minute? What
I am Lyosha [343]

Answer:

1. 1.5 inches per minute

2. 90 inches per hour

Step-by-step explanation:

speed = \frac{distance}{time}

1. total distance covered = \frac{9}{8} + \frac{27}{8}

                                      = \frac{9+27}{8}

                                      = \frac{36}{8}

                                      = 4\frac{1}{2} inches

Total time taken = \frac{3}{4} + \frac{9}{4}

                           = \frac{3 +9}{4}

                           = \frac{12}{4}

                           = 3 minutes

The ants average speed = \frac{4.5}{3}

                                         = 1\frac{1}{2}

                                         = 1.5

The ants speed is 1\frac{1}{2} inches per minute.

2. Since;

60 minutes = 1 hour

3 minutes = x hours

x = \frac{3}{60}

  = \frac{1}{60}

  = 0.05 hours

Speed = \frac{4.5}{0.05}

           = 90 inches per hour

The red ants speed is 90 inches per hour.

3 0
3 years ago
The total source voltage in the circuit is 6-3i V. What is the voltage at the middle source
Bezzdna [24]

Answer:

<em>The voltage at the middle source is</em> (2-4\mathbf{i})\ V

Step-by-step explanation:

<u>Voltage Sources in Series</u>

When two or more voltage sources are connected in series, the total voltage is the sum of the individual voltages of each source.

The figure shown has three voltage sources of values:

2 + 6\mathbf{i}

a + b\mathbf{i}

2 - 5\mathbf{i}

The sum of these voltages is:

V_t=4+a+(6+b-5)\mathbf{i}

Operating:

V_t=4+a+(1+b)\mathbf{i}

We know the total voltage is 6-3\mathbf{i}, thus:

4+a+(1+b)\mathbf{i}=6-3\mathbf{i}

Equating the real parts and the imaginary parts independently:

4+a=6

1+b=-3

Solving each equation:

a = 2

b = -4

The voltage at the middle source is (2-4\mathbf{i})\ V

5 0
2 years ago
Other questions:
  • Please help me on this.Im stuck on this question.Thanks! :)
    8·1 answer
  • Witch of the following is a true statement about a circle inscribed in a regular polygon
    15·1 answer
  • The points (x, 3) and (-1, -4) lie on the same line. if the slope of the line is 1 what is the value of x?​
    5·1 answer
  • Guy wires 80 feet of support for a 65- foot tall telephone Pole. To the nearest degree, what angle will the wires make with the
    14·2 answers
  • (x^2-5x+2) (3x^2+2x+3)
    13·1 answer
  • $16 for 2 tickets; $40 for 5 tickets
    12·2 answers
  • A square photo display board is made up of 60 rows and 60 photos each. The area of each square photo is 4 in.². How long is each
    13·1 answer
  • Slope of the line passing through points(-6,-7), (2,-7)
    5·1 answer
  • If k= [-2 9 -8 7 11 6 4 4 -3] then what is -k?
    10·2 answers
  • A train leaves at 14:03 and arrives at 16:22. It travelled at an average speed of 95 km/h. How far did it travel? Give your answ
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!