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Firlakuza [10]
3 years ago
5

Can anyone help me with this please?

Mathematics
1 answer:
Leno4ka [110]3 years ago
3 0

Answer: 54.33%

<u>Explanation:</u>

14 carat gold contains 58.33% gold and 4% silver (since we are using the lowest percentage).

58.33% - 4% = 54.33%

There is 54.33% more gold than silver in the 14 carat gold mixture.

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elena-14-01-66 [18.8K]

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Step-by-step explanation:

8 0
2 years ago
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Please help me out The equation 9(w + 7) = 27 solved in several steps below. For each step, choose the reason that best justifie
Vaselesa [24]
9w+63=27

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hope this helps
4 0
3 years ago
5-a/8=4/7 solve for a show your work
timama [110]
Subtract 5 from both sides
a/-8 = 4/7 - 5

simplify 4/7 - 5 to 31/-7
a/-8 = 31/-7

multiply both sides by 8 
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simplify 31/7 x 8 to 248/7
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multiply both sides by -1.
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The words are the explanations of the steps and the dark bolded words are the work shown for each step.
6 0
2 years ago
Find the variance of the set of data to the nearest tenth: 5, 8, 2, 9, 4
Orlov [11]

Answer:

Therefore the variance on the data set is 8.3

Step-by-step explanation:

In order to find the variance of the set of data we first need to calculate the mean of the set, which is given by:

mean = sum of each element / number of elements

mean = (5 + 8 + 2 + 9 + 4)/5 = 5.6

We can now find the variance by applying the following formula:

s^{2} = \frac{\sum_{(i=1)}^n(x_i - mean)^2}{n -1}

So applying the data from the problem we have:

s² = [(5 - 5.6)² + (8 - 5.6)² + (2 - 5.6)² + (9 - 5.6)² + (4 - 5.6)²]/(5 - 1)

s² = [(-0.6)² + (2.4)² + (-3.6)² + (3.4)² + (-1.6)²]/4

s² = [0.36 + 5.76 + 12.96 + 11.56 + 2.56]/4 = 8.3

Therefore the variance on the data set is 8.3

7 0
2 years ago
Marco wants to buy a new smartphone that costs $495, with some additional accessories. He has already saved $75. Write and solve
Eddi Din [679]
He needs 420 to buy a new smartphone and accessories.

75-495= 420
420+75= 495
4 0
3 years ago
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