PSAT 9 Review Test 1

Front

What is the quadratic formula used to solve equations of the form ax² + bx + c = 0?

Back

x = (-b ± √(b² - 4ac)) / (2a)

Front

How do you factor the expression x² + x - 12?

Back

(x + 4)(x - 3)

Front

What is the area of a rectangle with length 9 cm and width 15 cm?

Back

135 cm²

Front

If a potion's initial dosage is 2 grams and it is reduced to 0.45 grams, how much was the dosage decreased?

Back

1.55 grams

Front

What is the relationship between the number of nurses and patients in the formula 4 nurses for every 12 patients?

Back

For every 3 patients, there is 1 nurse.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

How do you solve the equation 3x² - 18x - 15 = 0 for x?

Back

Use the quadratic formula or factor the equation.

Front

What is the value of x² - 6x when x = 9?

Back

5

Front

How do you find the equivalent expression for x² + x - 12?

Back

Factor the expression to (x + 4)(x - 3).

Front

What is the process to find the decrease in dosage?

Back

Subtract the final dosage from the initial dosage.