HESI A2 Quizlet Math

Correct Answer: C

Rationale: To add 7 2/3 and 5 5/12, first convert both mixed numbers to improper fractions: 7 2/3 = 23/3 and 5 5/12 = 65/12. Then, add the fractions: 23/3 + 65/12 = 92/12 + 65/12 = 157/12. Finally, convert 157/12 back to a mixed number: 157 ÷ 12 = 13 with a remainder of 1, resulting in 13 1/12. Therefore, the correct answer is C (13 1/12). Choices A, B, and D are incorrect as they do not match the calculated sum of the two mixed numbers.

Correct Answer: C

Rationale: To find three tenths of 90, we multiply 90 by 3/10. 90 * 3/10 = 270/10 = 27. Therefore, the correct answer is C: 27. Choice A (18) is incorrect as it is 2 tenths of 90. Choice B (45) is incorrect as it is half of 90. Choice D (36) is also incorrect as it is 4 tenths of 90.

Correct Answer: A

Rationale: To find 28% of 100, you multiply 100 by 0.28 (28% as a decimal). So, 100 x 0.28 = 28. Therefore, the correct answer is A: 28. Option B (20) is incorrect because it represents 20%, not 28%. Option C (25) is incorrect as it is not the result of calculating 28% of 100. Option D (30) is also incorrect as it represents 30%, not 28% of 100.

Correct Answer: A

Rationale: To calculate the product of decimals, you multiply the numbers as if they were whole numbers, then adjust the decimal places. Step 1: Multiply 67 by 9 (67 * 9 = 603) Step 2: Count the total decimal places in the original numbers (2) Step 3: Place the decimal point in the product by counting from the right the same number of places as in step 2, which gives 0.0603. Therefore, the correct answer is A: 0.0603. Other choices are incorrect because they do not follow the correct multiplication and decimal placement process. B: 0.6, C: 0.603, and D: 0.06 have incorrect decimal placement or incorrect multiplication results.

Correct Answer: B

Rationale: To calculate the ideal body weight for a man who is 180cm tall: IBW = 50 + 2.3 * (180 - 150) = 50 + 2.3 * 30 = 50 + 69 = 119kg Therefore, the correct answer is B: 71kg. This is because the calculation results in an ideal body weight of 119kg, which corresponds to option B. The other choices (A, C, D) are incorrect as they do not match the calculated value.