Notice: Undefined variable: keyword in /home/domains2/public_html/mickey-rooney.com/inc/meta.php on line 18
7/8 students own a bike . 72 is the difference between the ones that own a bike and ones that do not. how many were surv

Guide :Elementary School

7/8 students own a bike . 72 is the difference between the ones that own a bike and ones that do not. how many were surveyed?

7/8 students own a bike . 72 is the difference between the ones that own a bike and ones that do not. how many were surveyed?
X + y is the number of students who were surveyed. x is the number who own a bike. y is the number who don't. the ratio of the ones who own a bike and the ones who were surveyed is x / (x + y) that ratio is 7/8. you get x / (x + y) = 7/8 multiply both sides of this equation by (x + y) to get x = (x + y) * 7/8 simplify to get x = 7/8 * x + 7/8 * y subtract 7/8 * x from both sides of this equation to get: 1/8 * x = 7/8 * y solve for x to get x = 7 * y this means that the number of students who own a bike is 7 times the number of students who don't. divide both sides of that equation by y to get x/y = 7/1. that means that the ratio of students who own a bike to the number of students who don't is equal to 7/1. the problem states that the difference between the number who own a bike and the number who don't is 72. this means that x - y = 72 from the equation of x = 7 * y, replace x with 7 * y in the equation of x - y = 72 to get: 7 * y - y = 72 simplify to get 6 * y = 72 divide both sides of that equation by 6 to get y = 72/6 = 12 this means that the number of students who do not own a bike is 12. since x = 7 * y, then x = 7 * 12 = 84. this means that the number of students who own a bike is 84. since the number of students is x + y, this means that the number of students who were surveyed is 84 + 12 = 96. let's see if this is right. 96 students were surveyed. 84 own a bike and 12 don't. the difference between the ones who own a bike and the ones who don't is 84 - 12 = 72. the ratio of the ones who own a bike and the number surveyed is 84/96 = 7/8. solution is 96 students were surveyed. ...

Notice: Undefined variable: position4 in /home/domains2/public_html/mickey-rooney.com/show.php on line 227

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Loading ...


Notice: Undefined variable: position5 in /home/domains2/public_html/mickey-rooney.com/show.php on line 283
  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || www.mickey-rooney.com || Terms of Use || Contact || Privacy Policy
Load time: 0.0161 seconds