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Ilia_Sergeevich [38]
3 years ago
14

Ravi made 6 identical necklaces, each having beads and a pendant. The total cost of the beads and pendants for all 6 necklaces w

as $31.80. If the beads cost a total of $18.60, how much did each pendant cost?
Mathematics
1 answer:
mart [117]3 years ago
4 0

Answer: $ 2.20

Step-by-step explanation: 31.80-18.60= 13.20

13.20 divided by 6= 2.20

——————-

2.20 x 6= 13.2

13.20+ 18.60= 31.80

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The seats at a local baseball stadium are arranged so that each row has five more seats than the row below it. If there are four
brilliants [131]

Answer:

Thus the last row has 119 seats.

The total number of seats in 24 rows = 1476

Step-by-step explanation:

The number of seats in each row make an arithmetic series. We will use arithmetic equation to find the number of seats in last row:

An = a1+ (n-1)d

An = 4+(24-1)5  

An = 4 + (23)(5)  

An = 4 + 115  

An = 119

Thus the last row has 119 seats.

Now to find the sum of seats we will apply the formula:

Sn = n(a1 + an)/2

Sn = 24(4+119)/2  

Sn = 24(123) /2  

Sn = 1476 .....

The total number of seats in 24 rows = 1476....

6 0
3 years ago
Read 2 more answers
Alan can type 80 words in two
Sonbull [250]

Answer:

2400 words

Step-by-step explanation:

80 = 2 min

60min ÷ 2min = 30min

30 × 80 = 2400 words

3 0
3 years ago
Read 2 more answers
From a group of 13 women and ​12 men, a researcher wants to randomly select 8 women and 8 men for a study. In how many ways can
Fantom [35]

The total number of ways the study can be selected is: 637065

Given,

Total number of women in a group= 13

Total number of men in a group = 12

Number of women chosen = 8

Number of men chosen = 8

∴ the total number of ways the study group can be selected = 13C₈ and 12C₈.

This in the form of combination factor = nCr

                                                     ∴ nCr = n!/(n₋r)! r!

13C₈ = 13!/(13 ₋ 8)! 8!

        = 13!/5!.8!

        = 1287

12C₈ = 12!/(12₋8)! 8!

        = 12!/5! 8!

        = 495

Now multiply both the combinations of men and women

= 1287 × 495

= 637065

Hence the total number of ways the study group is selected is 637065

Learn more about "Permutations and Combinations" here-

brainly.com/question/11732255

#SPJ10

4 0
2 years ago
Paula ran a total of 12 miles over the course of 2 track practices. What is the unit rate?
liq [111]

Answer:

\frac{6}{1}

Step-by-step explanation:

To find the unit rate we need to divide the # of miles over the number of practices to get the # of miles ran in a single practice:

\frac{12}{2}=\frac{6}{1}

Hope this helps!

5 0
3 years ago
Read 2 more answers
10+48+100+56+100,000+567,759,999,999+66+773
Luden [163]

Answer:

567,760,101,052‬

Step-by-step explanation:

7 0
3 years ago
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