MATHEMATICS MIDDLE SCHOOL

So I have a problem with a pie chart and I need to find the total amount of people surveyed using the amount of one portion of it.I cannot figure out how to do this, so I hope someone can help me. Also, I need you to explain how you got your answer because this is basically an essay question because I need to explain the steps on how I got it

Answers

Answer 1

Answer: 42% = 210 so,
42/100=210/x
Cross multiply-
42x=21000
Divide by 42 on both sides and you get- 500

Answer 2

Answer:

Answer:

500 Total people were surveyed

Step-by-step explanation:

All you gotta do is divide the number of football players, 210, by the percentage, 0.42. And when you divide 210 by 0.42, you get the total number of people surveyed, which was 500.

210 ÷ 0.42 = 500

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Jadamian claims that half of he odd numbers that are less than 100 are prime numbers. Is jadamian correct? Justify your answer

Answers

Well first of all, there are 50 odd numbers less than 100, and 26 of them are prime numbers. So about half of them are, but not quiet.

How do you divide 25.20 by 4

Answers

4 will go into 25 six times
that leaves 1.20. 4 goes into 1.20 .3 times
6+.3 is 6.3

6.3 (I used the calculator l)

The ratio of bananas to peaches in a fruit basket is 4 to 1. If there are 4 peaches in the fruit basket then how many bananas and peaches are there altogether?

Answers

if for every 4 bananas there is 1 peach, and there are 4 peaches in the fruit basket, then that means there are 16 bananas in the fruit basket and 16+4=20 so your answer is 20!

20 is your answer. 4 peaches 16 bananas

A scientist estimated that a mixture would need 3 milliliters of a chemical to balance. The actual amount needed was 7 milliliters. What was the percent error of the scientist's estimation?A. 133.33%
B. 3%
C. 42.86%
D. 57.14%

Answers

Answer:

57.14%

Step-by-step explanation:

Error(E)is defined as the percentage difference an estimate(e) amount is from the actual(a) amount. The actual amount need was 7 mililters and the estimate was 3 mililiters.

Error is defined as:

$E=(a-e/a)*100$

$E=(7-3/7)*100=57.14$

The percet error if the scientists estimation is 57.14%

Letter C is the answer

Minh has a coin collection of dimes and nickels worth $1.70. The number of nickels is four more than the number of dimes. How many of each coin does she have ?

Answers

Answer:

The number of coins each she have are 10 dimes coin and 14 nickel coins.

Step-by-step explanation:

Given:

Minh has a coin collection of dimes and nickels worth $1.70.

The number of nickels is four more than the number of dimes.

Now, to find each coins she have.

Let the number of dimes be $x$ .

And the number of nickels be $4+x$ .

As the value of dimes = $0.10, and the value of nickel = $0.05.

Now, according to question:

$0.10x+0.05(4+x)=1.70$

⇒ $0.10x+0.20+0.05x=1.70$

⇒ $0.15x+0.20=1.70$

Subtracting both sides by 0.20 we get:

⇒ $0.15x=1.50$

Dividing both sides by 0.15 we get:

⇒ $x=10$ .

Number of dimes = 10.

Number of nickel = $4+x=4+10=14.$

Therefore, the number of coins each she have are 10 dimes coin and 14 nickel coins.

If you answered 37 problems correctly on a 42 question test, what percent would you recieve

Answers

The fraction would be 37 out of 42. You basically divide the two and get something around 88%.

Final answer:

On a test with 42 questions, answering 37 correctly yields a score of approximately 88 percent. This result is obtained by dividing the number of correctly answered questions by the total number of questions, and then multiplying that result by 100 to find the percent.

Explanation:

The subject for this problem is percentages, a common topic in mathematics. To solve this, you need to relate the number of correct answers to the total number of questions. The formula for percent is (part / total) * 100, where the part is the number of problems you answered correctly (37), and total is the overall number of questions on the test (42).

In this case, you'd calculate (37 / 42) * 100, which equals approximately 88.09%. Therefore, if you answered correctly on 37 out of 42 questions, your score would be about 88 percent.

Learn more about percentages here:

brainly.com/question/32197511

#SPJ2

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