HESI A2 Math Practice Test 2023

Correct Answer: C

Rationale: Rationale: To find an equivalent expression for 5i, we can rewrite it as 5√-1. This is because i represents √-1. Therefore, 5i is equivalent to 5 times the imaginary unit, which simplifies to 5√-1. Choice A is incorrect as it represents the negative of 5 and not an imaginary unit. Choice B, i^5, is incorrect as it represents i raised to the power of 5 and not the equivalent of 5i. Choice D, 1/5i, is incorrect as it represents the reciprocal of 5i and not the equivalent value itself.

Correct Answer: D

Rationale: To find 80% of $500, you multiply $500 by 0.80. 0.80 represents 80% in decimal form. So, $500 x 0.80 = $400. Choice D is correct. Choice A is incorrect because $425 is 85% of $500. Choice B is incorrect because $450 is 90% of $500. Choice C is incorrect because $350 is 70% of $500.

Correct Answer: C

Rationale: Rationale: To find an equivalent expression for 5i, we can rewrite it as 5√-1. This is because i represents √-1. Therefore, 5i is equivalent to 5 times the imaginary unit, which simplifies to 5√-1. Choice A is incorrect as it represents the negative of 5 and not an imaginary unit. Choice B, i^5, is incorrect as it represents i raised to the power of 5 and not the equivalent of 5i. Choice D, 1/5i, is incorrect as it represents the reciprocal of 5i and not the equivalent value itself.

Correct Answer: A

Rationale: To simplify -5 + (-8), we first add the two numbers together. -5 + (-8) = -13. The negative sign in front of 8 indicates that the number is negative. Therefore, the correct answer is A: -13. Choice B (8) and Choice D (-5) are incorrect because they do not account for the negative sign in front of the 8. Choice C (13) is incorrect as it is the result of adding the absolute values of -5 and -8 without considering the negative sign.

Correct Answer: C

Rationale: To convert kilograms to grams, you need to multiply by 1000 since there are 1000 grams in a kilogram. Therefore, to convert 5 kilograms to grams, you would do: 5 kg x 1000 = 5000 grams. Choice C (5,000 grams) is the correct answer. Choice A (50,000 grams) and choice D (50,000 grams) are incorrect because they do not correctly convert the kilograms to grams. Choice B (500 grams) is incorrect because it represents the grams equivalent of 0.5 kilograms, not 5 kilograms.