SAT Math / High Yield Lessons
Solve the SAT's hardest systems, models, and word problems by typing every condition into one Desmos entry, then check that the answer Desmos gives is the one the question asks for.
Three equations, a plus b plus c equals 21, 2a minus b equals 9, and b plus 3c equals 32, are typed into one Desmos input box as two lists joined by a tilde. A panel opens under it showing a equals 7, b equals 5, c equals 9, and an error of 0. A gray pointer moves to the next input box, where a c minus b shows 58. Next, the graph of p squared minus 14p plus 33 crosses the axis at 3 and 11; the pointer moves to its tilde entry, a condition p greater than 7 is added in braces, and the panel shows p equals 11. Finally, the graph of q squared minus 18q plus 65 crosses the axis at 5 and 13: choose the condition that gives the greater solution, using the buttons after the picture.
