alleryStart learning →The number of girls in a study group was three more than twice the number of boys. There were 11 girls. How many boys were in the group?
A4
B7
C8
D3
Answer & Solution
Correct answer: A. 4
1. Let n equal the number of boys in the study group.
2. The number of girls, three more than twice the boys, translates to 2n plus 3.
3. Set that expression equal to 11 girls: 2n plus 3 equals 11.
4. Subtract 3 from each side and divide by 2 to get n equals 4 boys.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 3 "Math Models", section 3.1 Use a Problem-Solving Strategy_
Keep practising Math Models
Browse all Math Models questions for CAASPP Mathematics, or explore more Mathematics topics.
Related questions
The plural of the word vertex, used for the corners of a triangle, is what?By definition, what makes a triangle a right triangle?A triangular church window has an area of 90 square meters and a base of 15 meters. What iA triangular garden has a perimeter of 24 feet, and two of its sides measure 4 feet and 9 Two angles of a triangle measure 55 degrees and 82 degrees. What is the measure of the thiFor a triangle with base b and height h, what formula gives its area?For a triangle with side lengths a, b, and c, what formula gives its perimeter?For any triangle, what is the sum of the measures of its three interior angles?