AlgebraEasy–MediumValue of a linear model
Algebra practice question
A plant nursery has 80 seedlings and grows 2.5 more per day on average from cuttings. How many seedlings will it have after 20 days?
Answer: 130
80 + 2.5 × 20 = 80 + 50 = 130.
Common wrong answers
- If you answered 50
- 50 is the number grown, without the starting 80.
- If you answered 100
- 100 adds 20 to 80, treating the rate as 1 per day.
- If you answered 1650
- 1,650 multiplies (80 + 2.5) by 20.
More Algebra questions
- Easy–Medium
A line passes through the points (0, 3) and (2, 7). What is the slope of the line? - Easy–Medium
A gym charges a $25 one-time signup fee plus $15 per month. Which equation gives the total cost C, in dollars,… - Easy–Medium
If 5(x − 2) = 3x + 4, what is the value of x? - Easy–Medium
A taxi charges a $3.50 base fare plus $2.25 per mile. If a ride costs $19.25 total, how many miles was the rid… - Easy–Medium
The equation of a line is 3x + 2y = 12. What is the y-coordinate of the point where the line crosses the y-axi… - Easy–Medium
A line in the xy-plane passes through the points (1, 5) and (4, 11). What is the y-intercept of the line?
Not affiliated with the College Board. SAT is a trademark of the College Board.