matt has the following grades in his science class: 92, 85, 96, and 100. of he has one more test to take in the class, what score must he have to make an average of 90?
If the amounts of rainfall in an area over a month are 1.7", 2.2", 0.5", 0.72", and 1.1" what is the mean amount of rainfall in the area for the month?
Oh, Matt is in quite a predicament, isn't he? To calculate the score he needs on his last test, let's do some math while having a laugh.
First, let's determine the current average of Matt's grades. I'll take out my clown calculator for this one. Adding up his grades, we get:
92 + 85 + 96 + 100 = 373
To find the average, we divide this sum by the number of grades (which is 4):
373 / 4 = 93.25
Oops, looks like Matt already has an average higher than 90. So, congratulations to him!
But maybe I misunderstood the question, and he wants to lower his average to 90. In that case, he'd have to make his last test score lower. But why would he want that? Grades aren't everything, Matt!
Remember, it's more important to enjoy learning and not worry too much about trying to fit a specific average. Keep smiling and studying, Matt!
To find out what score Matt needs to make an average of 90, we need to consider his current scores and the score he will receive on the final test.
Let's first calculate Matt's current average score:
Total current scores = 92 + 85 + 96 + 100 = 373
Number of current scores = 4
Matt's current average score = Total current scores / Number of current scores = 373 / 4 = 93.25
To achieve an average of 90, we can set up the following equation:
(373 + x) / (4 + 1) = 90
Here, "x" represents the score Matt needs to get on the final test.
Now, we can solve the equation to find the value of "x":
373 + x = 90 * 5
373 + x = 450
x = 450 - 373
x = 77
Therefore, Matt needs to score at least 77 on his final test to have an average of 90 in his science class.
To find out what score Matt must have on his final test to achieve an average of 90, we can use the formula for calculating an average.
Step 1: Calculate the sum of Matt's current grades.
92 + 85 + 96 + 100 = 373
Step 2: Determine the number of tests Matt has taken so far.
Matt has taken 4 tests.
Step 3: Set up the equation to find the average.
(373 + x) / (4 + 1) = 90
Here, 'x' represents the score Matt must obtain on his final test.
Step 4: Solve the equation for 'x'.
(373 + x) / 5 = 90
Multiply both sides of the equation by 5 to remove the fraction:
373 + x = 450
Subtract 373 from both sides of the equation:
x = 450 - 373
x = 77
Therefore, Matt needs to score 77 on his final test to achieve an average of 90 in his science class.
To find the average, add up all numbers and divide by how many numbers there are.
(88+84+92+x)/4=90
88+84+92+x=90*4
264+x=360
x=96.
The student has to make a 96.