TEAS 7 Math Practice Test

Correct Answer: B

Rationale: Correct Answer: B Rationale: In January, Dr. Lewis worked 20 shifts. In February, she worked 3 times as many shifts as in January (3 * 20 = 60 shifts). In March, she worked half the number of shifts she worked in February (1/2 * 60 = 30 shifts). Therefore, the equation should be shifts = (20)(3)(1/2) = 30, which accurately represents the number of shifts Dr. Lewis worked in March. Summary of other choices: A: Incorrect because it adds shifts for each month without considering the relationships between them. C: Incorrect because it multiplies January and February shifts but does not account for March being half of February. D: Incorrect because it incorrectly multiplies 3 and 1/2 without considering the total number of shifts in February.

Correct Answer: B

Rationale: Correct Answer: B Rationale: In January, Dr. Lewis worked 20 shifts. In February, she worked 3 times as many shifts as in January (3 * 20 = 60 shifts). In March, she worked half the number of shifts she worked in February (1/2 * 60 = 30 shifts). Therefore, the equation should be shifts = (20)(3)(1/2) = 30, which accurately represents the number of shifts Dr. Lewis worked in March. Summary of other choices: A: Incorrect because it adds shifts for each month without considering the relationships between them. C: Incorrect because it multiplies January and February shifts but does not account for March being half of February. D: Incorrect because it incorrectly multiplies 3 and 1/2 without considering the total number of shifts in February.

Correct Answer: A

Rationale: The correct answer is A: $90. Given the ratio of 1:3 for house savings to rent, and the rent of $270 per month, we can set up a proportion. Let x be the amount saved for the house. The ratio equation is: x/270 = 1/3. Cross-multiplying gives x = 270/3 = $90. Therefore, the roommate saves $90 each month. Choice B: $270 is incorrect because that is the amount of rent paid, not the amount saved for the house. Choice C: $730 is incorrect as it is not derived from the given ratio and rent amount. Choice D: $810 is incorrect as it is also not in line with the ratio and rent information provided.

Correct Answer: C

Rationale: To determine the amount of blood used for further tests, we first find 1/6 of 500 ml: 1/6 * 500 = 83.33 ml. Therefore, the correct answer is C (83.33 ml), rounded to the nearest hundredth. Choice A (83) is incorrect as it does not account for the decimal value. Choices B (83.3) and D (83.34) are also incorrect as they do not accurately round the calculated value to the nearest hundredth.

Correct Answer: A

Rationale: To simplify the expression, you first add the numbers together: 1.034 + 0.275 = 1.309. Then, subtract 1.294 from the result: 1.309 - 1.294 = 0.015. Therefore, the correct answer is A (0.015). Choices B, C, and D are incorrect as they do not match the calculated result of 0.015.