Tino conducted a survey of all the eighth graders in his school for his math project. He asked each student how much he or she spent on school supplies at the beginning of the year (rounded to the nearest dollar). He also calculated the average amount spent and found it to be $15.50. Unfortunately, it rained on the day he brought the graph to turn in, and the last bar got smudged. What is the height of the smudged bar?
I figured out the answer to the equation, and you need the graph to do so. It's not actually impossible, you just need the pdf that comes with it.
First, you have to make a very tedious equation of the dollars spent multiplied by the number of kids, plus the next, plus the next... you should get this:
12(18)+13(20)+14(21)+15(22)+16(18)+17(16)+18(8)+19(10)
Now you have to add the unknown equation. We know that the dollars spent was 20, so you add 20x to the equation. 12(18)+13(20)+14(21)+15(22)+16(18)+17(16)+18(8)+19(10)+20x
Now we have to make an equation to find the average. Add all of the numbers of kids together, including x. You should get 133+x. 18+20+21+22+18+16+8+10+x=133+x
Now you have the equation [12(18)+13(20)+14(21)+15(22)+16(18)+17(16)+18(8)+19(10)+20x]
/133+x
You have to make this into an equation to find x, and you know what the average should be. The average should be 15.5, so you should get [12(18)+13(20)+14(21)+15(22)+16(18)+17(16)+18(8)+19(10)+20x]/133+x=15.50.
Now you have to multiply and add everything in the parenthesis, (Just use a calculator.) You will then get [1994+20x]/133+x=15.50
Then, multiply both sides by 133+x to get 1994+20x=15.5x+2061.5.
Then you subtract 15.5x from both sides to get 1994+4.5x=2061.5
Now you subtract 1994 from both sides, getting 4.5x=67.5
If you divide both sides by 4.5, you should get x=15, meaning that 15 kids spent 20 dollars on school supplies!
Then, you can check your work by replacing x with 15. 1994+300=2294
133+15=148
2294/148=15.5
And that's your answer! 15!
With your limited data, there is no way to tell.
15
15 i think
the answer is 6.5
Which answer is it
i am very confued on how to sovle this please send help and give me the answer on how to do this😤😤😤😤😤
To determine the height of the smudged bar, we can use the fact that the average amount spent on school supplies by all eighth graders in Tino's school is $15.50.
Since Tino conducted a survey of all the eighth graders, we can assume that he collected data from each student. This means that he should have the exact amount spent by each student in order to calculate the average.
To find the height of the smudged bar, Tino needs to recalculate the average by excluding the data for the smudged bar, and then subtract this recalculated average from the original average.
Here's an example calculation:
Let's say Tino had data for 20 students, and the smudged bar represents the amount spent by the last student. We know that the average spent by all students is $15.50.
So, the total amount spent by all the students (excluding the smudged bar) would be (20 students - 1 student) x $15.50 = 19 x $15.50 = $294.50.
If Tino knows the total amount spent on school supplies by all the students except the one represented by the smudged bar, he can divide this total by the number of students (excluding the smudged bar) to recalculate the new average.
Once Tino has recalculated the new average, he can subtract this value from the original average to find the height of the smudged bar.
Without knowing the exact data and the number of students surveyed, we cannot provide a specific calculation of the height of the smudged bar. Tino will need to recalculate the average and subtract it from the original average himself based on the available data.
?
LALALALALALALALALALALALALALALALALALALALALALALALALALALAALALALALALALALALALALALALALALALALALALALALALALALALALALLALALALALALALALALALALALALALALALALALALALALALALALALALALALALALALLALALALALALALALALALALLAALALLALALALALALALALAALALLALALAALLALALLAAALLALLALALALALALALALLALALALALALLALALALALAL