HESI A2 Practice Test Math

Correct Answer: C

Rationale: The correct answer is C (150cm). To calculate the perimeter of the stop sign, you add up the length of all five sides, which is 25cm each. So, 25cm x 5 = 125cm. The rationale behind this is that the perimeter of any polygon is the sum of all its sides. Therefore, the correct perimeter of the stop sign is 125cm. The other choices are incorrect because they do not result from the correct calculation based on the dimensions given. Option A (100cm) is too small, Option B (125cm) is the result of calculating one side only, and Option D (175cm) is too large.

Correct Answer: A

Rationale: Failed to generate a rationale after 5 retries.

Correct Answer: A

Rationale: To evaluate xm - 2m when x = -2 and m = -3: Substitute x and m into the expression: (-2)(-3) - 2(-3) Simplify: 6 + 6 = 12 Therefore, the correct answer is A (12). The other choices are incorrect as they do not match the correct calculation.

Correct Answer: A

Rationale: To solve for x in the equation X/4 = 9/x, we can cross multiply to get X * x = 4 * 9. Simplifying further, we get x^2 = 36, so x = √36 = 6. Choice A (x = 6) is correct. Choices B, C, and D are incorrect because they do not satisfy the equation when substituted back in. B: 6/4 ≠ 9/6, C: 6/4 ≠ 9/9, D: 6/4 ≠ 9/2.

Correct Answer: A

Rationale: To find x, we need to set up a proportion: 15/x = 3/8. Cross multiply to get 15*8 = 3*x. Solving for x gives x=40. Choice A is correct because it correctly solves the proportion. Choices B, C, and D are incorrect as they do not yield the correct value of x when solving the proportion.