HESI A2 Math 2024

Correct Answer: C

Rationale: Let Lulu's sister's age be x. According to the given information, x = 15 (cousin's age) + 7 = 22. So, Lulu's sister is 22 years old. Since Lulu is 5 years younger than her sister, Lulu's age is 22 - 5 = 17. Therefore, Lulu is 17 years old. Choices A, B, and D are incorrect because they do not correspond to the calculations based on the information provided in the question.

Correct Answer: A

Rationale: In Roman numerals, the date 2007 is correctly represented as MMVII. The Roman numeral M stands for 1000, and when repeated twice (MM), it represents 2000. The Roman numeral V represents 5, and when followed by II (two ones), it correctly represents 2007. Choice B (MDVII) is incorrect because D represents 500, and 2007 is greater than that. Choice C (MMDII) is incorrect because D represents 500, and there are two of them, making it 1000, not 2000. Choice D (MMXD) is incorrect as XD is an invalid Roman numeral combination.

Correct Answer: C

Rationale: If 80% of the class passed with a 75 or higher, and that equals 24 students, you can set up a proportion to find the total number of students in the class. Since 80% is equal to 24 students, 100% (the whole class) would be equal to (24/80) x 100 = 30 students. Therefore, the total number of students in the whole class is 30 / 80 x 100 = 36. Choice A (18) is incorrect as it does not match the calculation based on the information given. Choice B (30) is incorrect because it represents the intermediate calculation but not the total number of students in the class. Choice D (60) is incorrect as it is double the correct answer and does not align with the given information.

Correct Answer: C

Rationale: Rationale: 1. To convert Fahrenheit to Celsius, you can use the formula: �C = (�F - 32) x 5/9. 2. Given that the patient's body temperature is 102�F, we can calculate the equivalent temperature in Celsius: �C = (102 - 32) x 5/9 �C = 70 x 5/9 �C = 350/9 �C ≈ 38.9�C, which can be rounded to 39�C. 3. A body temperature of 39�C is considered to indicate a fever. Normal body temperature typically ranges from 36.1�C to 37.2�C, so a temperature of 39�C is higher than the normal range and suggests a fever. 4. Options A and B are incorrect as they do not reflect the conversion of 102�F to �C

Correct Answer: C

Rationale: To add 4⅔ and 6�, we first need to convert the fractions to have the same denominator. Converting 4⅔ to 6ths gives us 8/6, and 6� to 6ths gives us 7/2. Adding them together gives 15/2, which simplifies to 7� or 9⅙. Therefore, the correct answer is 9⅙. Choices A, B, and D are incorrect as they do not represent the correct sum of the fractions after conversion and simplification.