All categories

3 years ago

A polyhedron has the following characteristics. Find the missing value.

1 answer:

6 0

Formula : V + F – E = 2
where V = number if vertices, F = number of faces and E = number of edges

Question a:

V + F - E = 2
V = 2 - F + E
V = 2 - 12 + 18
V = 8

(a) 12 faces, 18 edges, 8 vertices

Question b:

V + F - E = 2
E = V+ F - 2
E = 14 + 8 - 2
E = 20

(b) 8 faces, 20 edges, 14 vertices

You might be interested in

Solve the following system of equations by graphing. y = -1/2x-1 y = 1/4x -4

nordsb [41]

Answer:

x=4,y=−3

Step-by-step explanation:

8 0

3 years ago

Split the number 76 into the ratio 6:3:7:3 .

kompoz [17]

Answer:

24:12:28:12

Step-by-step explanation:

76÷19=4

6×4:3×4:7×4:3×4

=24:12:28:12

3 0

3 years ago

Three students have started a fence-painting business. Working together, Pragnesh and Qazi can paint the fence in 2 hours. Simil

vlada-n [284]

Answer: 55.4 mins

Step-by-step explanation:

pragnesh and qazi = 2hrs

pragnesh and roghui = 3hrs

qazi and roghui = 4hrs

this means for every 1 hour they wold paint.

pragnesh and qazi = $\frac{1}{2}$ half of the fence

pragnesh and roghui = $\frac{1}{3}$

qazi and roghui = $\frac{1}{4}$ quarter of the fence

time taken when they all work together

= $\frac{1}{2}$ + $\frac{1}{3}$ + $\frac{1}{4}$

= $\frac{13}{12}$

= $\frac{12}{13}$

= 0.9231 × 60(mins)

= 55.4 mins

8 0

3 years ago

In which year did the population grow the fastest ? Justify your answer using the average rate of change

ch4aika [34]

1957 avg rate of 500,000 per every person

3 0

3 years ago

Lois bought clothing at a store. She did not have enough in her bank account to pay for the purchase. After receiving the bill a

fomenos

Lois used a credit card to make the purchase.

One can't purchase an item that costs more than the balance in a debit card. The debit card is equivalent to cash on hand. You can only spend what you have.

The credit card is equivalent to a loan. You don't have the money as of the moment but when you use the credit card, you owe the issuing bank the amount you've put on credit. The bank will pay the merchant and you will pay the bank. Interest is an additional expense when you pay your bill beyond the due date. The interest is applied on the amount outstanding upon the payment due date.

8 0

3 years ago

Read 2 more answers