89, 88, 78, 95, 92
Sadye has the Algebra test scores shown. If her goal is to have a test average of 90 or higher what is the lowest score she can make on her next test and still achieve her goal? Note: scores are not rounded.
She needs a total of 540 points.
540 - (89+88+78+95+92) = ?
IT IS NOT 94
To find the lowest score Sadye can make on her next test and still achieve her goal of having a test average of 90 or higher, we need to use the concept of average.
First, let's calculate Sadye's current average score. We add up all her existing test scores and divide it by the number of tests she has taken:
(89 + 88 + 78 + 95 + 92) / 5 = 442 / 5 = 88.4
Currently, Sadye has an average score of 88.4.
Now, let's assume that Sadye takes the next test and scores x (the lowest score she can make) on it. To achieve an average score of 90 or higher, the sum of all her scores should be:
(442 + x) / 6 >= 90
To solve for x, we can rearrange the equation:
442 + x >= 540
x >= 540 - 442
x >= 98
Therefore, Sadye needs to score 98 or higher on her next test to achieve her goal of having a test average of 90 or higher.
It's 94.
(89+88+78+95+92+x)/6 = 90
solve for x