HESI A2 Study Guide: Comprehensive Prep for Your Nursing Exam

Correct Answer: A

Rationale: To solve for X, first subtract 90 from both sides: 2X = 270 - 90, which simplifies to 2X = 180. Then, divide by 2: X = 180/2 = 90. Therefore, the correct answer is A) 90.

Correct Answer: A

Rationale: To solve this proportion, we use the property that in a proportion, the product of the means is equal to the product of the extremes. So, 3 * x = 2 * 24. By solving for x, we find x = 16. Therefore, the correct answer is A. In this analogy, the relationship between the first pair of numbers (3 and 2) must hold true for the second pair of numbers (24 and x). By setting up the proportion, we can find the missing value x. This type of problem is common in mathematics and helps test your understanding of proportional relationships.

Correct Answer: A

Rationale: To solve the multiplication problem 28 — 0.6, you multiply 28 by 0.6, which equals 16.8. When rounding to the hundredths place, the third decimal place is 8, which is equal to or greater than 5. Therefore, you round up the second decimal place, resulting in 16.8 rounding up to 16.80 or 16.8. Hence, the correct answer is 46.67, not 16.8.

Correct Answer: A

Rationale: To find out how far Roger can drive on a full tank, you multiply the miles per gallon by the tank capacity: 25 miles/gallon x 16 gallons = 400 miles. Therefore, the correct answer is 400 miles. This calculation shows that Roger can drive 400 miles on a full tank of gas.

Correct Answer: B

Rationale: To convert a decimal to a percent, you move the decimal point two places to the right and add a percentage sign. In this case, 0.64 becomes 64%. Therefore, the correct answer is B.