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faltersainse [42]
3 years ago
5

4 (negative one-half x + 7) + 5 x = 15

Mathematics
1 answer:
Ronch [10]3 years ago
4 0

Answer:

Step 3 is incorrect

Step-by-step explanation:

4(-1/2x + 7) + 5x = 15

-2x + 28 + 5x = 15

3x + 28 = 15

3x + 28 - 28 = 15 - 28

3x = -13

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1. A store manager marked up the price of a $12 clock by 20%. What is the new price of the clock?
Anon25 [30]

Answer:

1) new price of the clock is $14.4

2) Kyra scored 70% marks

3) 43.75% students are not eighth graders

Step-by-step explanation:

1. A store manager marked up the price of a $12 clock by 20%. What is the new price of the clock?

Price of Clock = $12

Mark up = 20%

We need to find new price of clock.

The price of  clock can be found by finding 20% of 12 and then adding that amount in original price.

So, finding 20% of 12

20\% of 12 \\=\frac{20}{100}\times 12\\=2.4

So 20% of 12 is 2.4

Now finding new price:

New Price = Actual Price + Mark up

New Price = 12 + 2.4

New Price = 14.4

So, new price of the clock is $14.4

2. On a math quiz, Kyra answered 7 of 10 questions correctly. Express her quiz score as a percent.

Total questions = 10

Correct answers = 7

We need to express her quiz score as percent

It can be found using formula: Percent Score = \frac{Obtained\:Marks}{Total\:Marks}\times 100\%\\

Putting values and finding percentage

Percentage = \frac{Obtained\:Marks}{Total\:Marks}\times 100\%\\\\Percentage = \frac{7}{10}\times 100\%\\Percentage = 70\%

So, Kyra scored 70% marks

3. 96 students are enrolled in the Dance Program at Castillero. Of those students, 54 are eighth-graders. The remaining students are 6th or 7th graders. What percentage of the students are not eighth graders?

Total Students = 96

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Remaining students = 96 - 54 = 42

So, 42 students are 6th or 7th graders

We need to find percentage of the students are not eighth graders.

\frac{42}{96}\times 100\%\\=43.75\%

So, 43.75% students are not eighth graders

4 0
3 years ago
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Answer: she needs to babysit 4 more times.

Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

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Volume = 96, 672 yards

6 0
3 years ago
Read 2 more answers
EXPLAIN<br> A LOT OF POINTS!!!
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Answer:

x−(−16)=−28+12

x−(−16)=−28+12

x+16=−28+12

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3 0
3 years ago
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lys-0071 [83]

Answer:

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This would be the best choice make the x axis the sports

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