HESI A2 Math Practice

Correct Answer: C

Rationale: To find the total words typed in 20 minutes, multiply the typing speed (45 words/minute) by the duration (20 minutes): 45 words/minute * 20 minutes = 900 words. The correct answer is C (900 words) because it accurately calculates the total words typed in 20 minutes. Choices A, B, and D are incorrect as they do not accurately reflect the multiplication of typing speed and duration.

Correct Answer: B

Rationale: To solve for x in the equation 3x + 9 = 0, first, subtract 9 from both sides to isolate 3x. This gives you 3x = -9. Next, divide both sides by 3 to solve for x, which results in x = -3. Therefore, the correct answer is B. Choice A is incorrect as it does not account for the correct arithmetic operations. Choice C is incorrect because it does not yield a solution that satisfies the equation. Choice D is incorrect as it does not follow the correct steps to solve for x.

Correct Answer: B

Rationale: To find the rate of calories burned per mile, divide the total calories burned (2276) by the total miles run (21.4). So, 2276 / 21.4 = 106.4, which is choice B. This calculation gives us the average rate of calories burned per mile. Choices A, C, and D are incorrect as they do not match the calculated value. Therefore, the correct answer is B based on the calculation method.

Correct Answer: A

Rationale: To express 0.025 as a ratio, we need to convert it to a fraction first. 0.025 as a fraction is 25/1000. Simplifying this gives us 1/40. Therefore, the correct ratio is 1:40. Choice A is correct as it represents the simplified form of 0.025 as a ratio. Choices B, C, and D are incorrect as they do not represent the equivalent simplified ratio of 0.025.

Correct Answer: B

Rationale: To determine the number of nurses needed for 25 patients, we can set up a proportion based on the given information. If 3 nurses can care for 15 patients, then the ratio of nurses to patients is 3:15 or 1:5. To find out how many nurses are needed for 25 patients, we can set up the proportion 1/5 = x/25 and solve for x. Cross multiplying gives us 5x = 25, so x = 25/5 = 5. Therefore, 5 nurses are needed for 25 patients. Choice A (4 nurses) is incorrect because it does not account for the increased number of patients. Choice C (6 nurses) and Choice D (7 nurses) are also incorrect as they overestimate the number of nurses needed based on the given ratio of nurses to patients.