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Stolb23 [73]
2 years ago
6

Collins Middle School has 224 sixth grade students. If the sixth grade is 35% of the total school, how many students are in the

middle school?
Mathematics
1 answer:
Likurg_2 [28]2 years ago
4 0

There are 640 students in the middle school.

Step-by-step explanation:

Given,

Number of sixth grade students = 224

Percent of sixth grade students = 35%

Let,

x represent the total number of students in school.

35% of x = 224

\frac{35}{100}*x=224\\0.35x=224

Dividing both sides by 0.35

\frac{0.35x}{0.35}=\frac{224}{0.35}\\x=640

There are 640 students in the middle school.

Keywords: percentage, division

Learn more about division at:

  • brainly.com/question/11223427
  • brainly.com/question/11229113

#LearnwithBrainly

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Step-by-step explanation:

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Can you explain step by step for #15 and #16 I have a test on this tomorrow
RUDIKE [14]

Answer:

15.

\left\{\begin{array}{l}x+y=50\\0.2x+0.1y=6\end{array}\right.

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Step-by-step explanation:

A chemist takes x ml of 20% saline and y ml of 10% saline. In total, he takes

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x + y = 50.

There are  0.2x ml of salt in x ml of 20% saline and 0.1y ml of salt in 10% saline. There are 0.12\cdot 50=6 ml of salt in 50 ml of 12% saline. Thus,

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15. We get the system of two equations:

\left\{\begin{array}{l}x+y=50\\0.2x+0.1y=6\end{array}\right.

16. Solve this system. From the first equation:

x=50-y

Substitute it into the second equation:

0.2(50-y)+0.1y=6\\ \\10-0.2y+0.1y=6\\ \\-0.1y=6-10\\ \\-0.1y=-4\\ \\y=40\\ \\x=50-y=50-40=10

7 0
2 years ago
An inequality is shown: −np − 4 ≤ 2(c − 3) Which of the following solves for n?
sesenic [268]

Answer:

\huge\boxed{n\leq\dfrac{2-2c}{p}\ \text{for}\ p0}

Step-by-step explanation:

-np-4\leq2(c-3)\qquad\text{use the distributive property}\\\\-np-4\leq2c-6\qquad\text{add 4 to both sides}\\\\-np\leq2c-2\qquad\text{change the signs}\\\\np\geq2-2c\qquad\text{divide both sides by}\ p\neq0\\\\\text{If}\ p0 ,\ \text{then}\\\boxed{n\geq\dfrac{2-2c}{p}}

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djyliett [7]

Answer: She should sell each T-Shirt for at least $4.41

Step-by-step explanation:

First you need to figure out what the total cost of the 200 t shirts was plus shipping. so 200 t shirts for 2.8 would cost $560 + a 5% shipping fee ($28) = 588 if she wants to markup by 150. you would then multiply 588 * 1.5 = $882. This would be the final money she wants to make by the end of her school carnival. Divide 882/200 (amnt of t-shirts) to get $4.41 per shirt

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