SAT Math Practice Question #316 (Hard (800)) | Test Citadel
TC
Test Citadel
SAT Math Difficulty: Hard (800)

Digital SAT Math Practice Question #316

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

The equations \[ y = 3x^2 - kx + 7 \] and \[ y = mx - 5 \] are graphed in the \( xy \)-plane, where \( k \) and \( m \) are positive constants. The line intersects the parabola at exactly one point. If \( k - m = 2 \), what is the value of \( k \)?
Select Your Answer:
Socratic AI Engine Step-by-Step Derivation
0ms Precomputed
Tactical Insight (Hint 1)

Identify the quadratic form: consider converting to vertex form \( y = a(x-h)^2 + k \) or using \( x = - rac{b}{2a} \) to find the line of symmetry.

Elimination Framework (Hint 2)

Desmos Tactical Shortcut: Plot the left-hand side and right-hand side as separate equations (e.g. \( y_1 = f(x) \) and \( y_2 = g(x) \)). Click the intersection points directly to read exact coordinates.

Masterclass Solution & Distractor Trap Analysis

This is a beautiful, elite-level advanced algebra question testing your mastery of non-linear systems and the discriminant. Step 1: Set up the system. To find the intersection of the parabola and the line, we set their \( y \)-values equal ...

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

🔒 Citadel Pro Scholar Vault

Unlock Full Solution & 2,600+ Official Drills

Access detailed Socratic steps, trap breakdowns, authentic timed module simulations, and Desmos speed hacks for just $9.99/mo.

Socratic Assistant

Targeted hints without disclosing final solutions.

I am your Socratic tutor. Click one of the quick guidance buttons above or ask a specific question below about a formula or method.