# Math (Algebra 1)

Juan’s first 3 exam scores are 85, 93, and 87. What does he need to score on his next exam to average 90 for all 4 exams?

let x represent the score on his next exam

(put this in a multi-step equation)

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. an average of 90 on 4 exams means 4*90=360 points in all.

So, how many points shy of 360 is the sum of the first three tests?

1. 👍
2. 👎
3. ℹ️
4. 🚩
2. 95

1. 👍
2. 👎
3. ℹ️
4. 🚩
3. Jose wants to have an average of 80 for his 4 exams. Each exam is scored on a scale of 0 to 100. His first three exam scores are: 87, 72, 85. What does Jose need to score on the 4th exam to have a mean of 80 on all 4 exams?

1. 👍
2. 👎
3. ℹ️
4. 🚩
4. 95

1. 👍
2. 👎
3. ℹ️
4. 🚩
5. you wourngsf

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

1. ### math

Maria has the following scores on exams in her social studies class 86, 75, 97, 58, 94, and 58 A. find the mean, median, and mode of the scores. B. Should Maria's social studies teacher use the mean, median, or mode of the exam

2. ### Algebra 2: Probability and Stats

The scores on an exam are normally distributed, with a mean of 77 and a standard deviation of 10. What percent of the scores are greater than 87? * 68% * 16% * 84% * 2.5%

3. ### statistics

7 men and 3 women are ranked according to their scores on an exam. Assume that no two scores are alike, and that all 10! possible rankings are equally likely. Let X denote the highest ranking achieved by a man (so X=1 indicates

4. ### statistics

SAT Exam Scores – A school administrator wonders if students whose first language is not English score differently on the math portion of the SAT exam than students whose first language is English. The mean SAT math score of

1. ### mathematics

Evan earned a score of 610 on Exam A that had a mean of 650 and a standard deviation of 40. He is about to take Exam B that has a mean of 600 and a standard deviation of 50. How well must Evan score on Exam B in order to do

2. ### mathematics

Savannah earned a score of 43 on Exam A that had a mean of 36 and a standard deviation of 5. She is about to take Exam B that has a mean of 650 and a standard deviation of 40. How well must Savannah score on Exam B in order to do

3. ### Math

A class of 12 students has taken an exam, and the mean of their scores is 71. One student takes the exam late, and scores 92. After including the new score, what is the mean score for all 13 exams?

4. ### math, probability

Exercise: CLT applicability Consider the class average in an exam in a few different settings. In all cases, assume that we have a large class consisting of equally well prepared students. Think about the assumptions behind the

1. ### Stats

Suppose the scores of students on an exam are Normally distributed with a mean of 297 and a standard deviation of 66. Then approximately 99.7% of the exam scores lie between the numbers _____and _______such that the mean is

2. ### statistics

Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between

3. ### Statistics

5. Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6. a. What is the probability that a randomly selected exam will have a score of at least 71? b. What

4. ### Statistics

In Professor Smith's statistics course, the correlation between students' total scores before the final exam and their final exam scores is r = 0.67. The pre-exam totals for all students in the course have a mean of 275 and a