# guess and check

posted by .

there are 42 question on lindas test. sum of the questions are 2 point and sum were 3 points. she got a perfect score

• guess and check -

Let the number of 2 point questions be x
then the number of 3 point questions is 42-x

2x + 3(42-x) = 100

solve

(Igot x=26)

## Similar Questions

1. ### Reply to grant about a regression problem

This is a reply to the question posted here http://www.jiskha.com/display.cgi?
2. ### Math

Jack is taking a four-item true-false test. He has no knowledge about the subject of the test and decided to flip a coin to answer the items. What is the probability that he receives a perfect score?
3. ### guess and check

there are 42 question on lindas test. sum of the questions are 2 point and sum were 3 points. she got a perfect score. how many 2 question where there and 3 point questions were on lindas test
4. ### math

Your teacher is giving you a test worth 100 points containing 40 questions. There are two-point and four-point questions on the test. How many of each type of question are on the test?
5. ### physics

vector (V1) is 6.3 units long and points along the negative (X) axis. Vector(V2) is 9.0 units long and points at 55 degree to the positive (X)axis. 1- What are the (X) and (Y) components of (V1) vector ?
6. ### Algebra

You take a three question true-or-false quiz. You guess on all the questions. What is the probability that you will get a perfect score?
7. ### math

Write an equation relating the number of questions I get right on a test to the total score I will get if the test has 20 questions each with the same point value and the test is worth 100 points total. I know each question is worth …
8. ### math

On a 28-question test, there are 2-point questions, 4-point questions, and 5-point questions. The test is worth a total of 100 points. There are twice as many 2-point questions as 5-point questions on the test. How many 2-point questions …
9. ### Math-Algebra

Tony asked his friend to guess his mathematics test score. He gave these hints to help his friend guess: -It has two digits -The digit in the tens place is two more than twice the digit in the ones place. -The number formed by reversing …
10. ### MATH

Sally is evaluating some test papers. There are 80 multiple choice questions in the test. Students get two points for every correct answer and for every wrong answer or any question left blank, one point is deducted from the total …

More Similar Questions