Final answer:
(a) and (b), since both 8 - 1 and 9 - 2 are equivalent to 7, whereas option (c) is the number 10, which is not equivalent to 7, and option (d) is an irrelevant number 95.9.
Step-by-step explanation:
The correct answer is option (c) 10. The question asks us to look for expressions equivalent to the number 7. The presented options are 8 - 1, 9 - 2, 10, and 95.9. We can determine the equivalent expressions by performing the subtraction in the first two options and comparing the results:
- 8 - 1 = 7
- 9 - 2 = 7
- 10 is not a subtraction operation, but if we evaluate it as a stand-alone number, it is not equal to 7.
- 95.9 is clearly not equal to 7 and is irrelevant for this question.
Therefore, the expressions equivalent to 7 are 8 - 1 and 9 - 2. Options (a) and (b) are your correct answers.
The correct answer is option a) 8 - 1 and option b) 9 - 2.
To determine which expressions are equivalent to 8 - 1, we need to simplify each expression. When we simplify 8 - 1, we get 7. Similarly, when we simplify 9 - 2, we get 7 as well. Therefore, both options a) and b) are equivalent to 8 - 1.
Options c) and d) are not equivalent to 8 - 1. Option c) 'lo' is not a valid mathematical expression, and option d) 95.9 is not equal to 8 - 1.