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frosja888 [35]
3 years ago
8

Please help me please, please, please

Mathematics
1 answer:
yaroslaw [1]3 years ago
3 0

Answer:

23.3%

Step-by-step explanation:

Wow, that's definitely a confusing way to teach it. Let me help you understand it:

7 is what percent of 30? This is:

7 / 30 or \frac{7}{30}

We are going to do cross multiplication to find the missing value, X.

\frac{x}{100} =\frac{7}{30}

30 * X = 100 * 7

30X = 700

X = \frac{700}{30}

X = 23.3 % is the missing value

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Gwar [14]
The Answer To This Problem is: C.-4
8 0
4 years ago
. Duke's photography pays $9 for a 5x7 photograph.
g100num [7]

Answer:

the markup percentage is 66.67%

Step-by-step explanation:

The computation of the percent of markup based on cost is shown below:

= (Selling price - paid price) ÷ (paid price)

= ($15 - $9) ÷ ($9)

= 66.67%

By taking the difference of the selling price & paid price and then divided it by paid price we can get the percentage of markup

Hence, the markup percentage is 66.67%

5 0
3 years ago
257/5000 In an envelope there are 20 ballots, 8 have drawn a car the rest are white. Find the probability to extract at least on
Gwar [14]

Answer:

Step-by-step explanation:

There are 20 ballots, 8 have drawn a car the rest are white.

Find the probability to extract at least one ballot with the drawing of a car if not replaced:

1. If a ballot is taken out:

8 have drawn a car: thus we have 8/20 = 2/5

2. If two ballots are removed, probability of extracting 1 ballot with drawing of car is 8/20 leaving 7 out of 19 remaining. The 7/19 is the probability of drawing out a second ballot with the drawing of a car. Thus we have

8/20 * 7/19 = 56/380 = 14/95

3. If three ballots are removed, probability of extracting 1 ballot with drawing of car is 8/20 leaving 7 out of 19 remaining. The 7/19 is the probability of drawing out a second ballot with the drawing of a car leaving 6 out of 18 remaining. The 6/18 is the probability of drawing out a third ballot with the drawing of a car.

8/20 * 7/19 * 6/18 = 42/855

5 0
4 years ago
Kayla sold half of her comic books and then bought seven more. she now has 28. with how many did she begin
bezimeni [28]
28 - 7 = 21
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7 0
3 years ago
7. If Donna works 8 hours and earns
krek1111 [17]
Y = 25 times x
or you could write it as
y=25x
•
hope this helps!
5 0
3 years ago
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