AlgebraHardConstant from two points on a line
Algebra practice question
The points (2, a) and (a, 8) both lie on the line y = x + 3 in the xy-plane. What is the value of a?
Answer: 5
From (2, a): a = 2 + 3 = 5. Check (5, 8): 5 + 3 = 8.
Common wrong answers
- If you answered 3
- 3 is the intercept.
- If you answered 8
- 8 is the y-coordinate of the second point.
- If you answered 11
- 11 uses a = 8 + 3.
More Algebra questions
- Hard
For how many integer values of x is −2 < (x − 5)/3 ≤ 1 true? - Hard
The system 2x + 3y = 6 and 4x + 6y = k has infinitely many solutions. What is the value of k? - Hard
Which of the following is the complete solution set to |x − 4| < 6? - Hard
A student has $40 to spend on notebooks costing $4 each and pens costing $2 each, and wants at least 12 items … - Hard
What is the least whole number of minutes of international calling in a month for which the total monthly cost… - Hard
How many liters of the 30% acid solution did the technician use?
Not affiliated with the College Board. SAT is a trademark of the College Board.