Use properties of rational numbers to simplify the expression. -21 - (44.07 + 13) a. -52.07 b. -78.07 c. 36.07 d. 10.07

Correct option is C

Step-by-step explanation:

Given the two expression

and

Anja is substituting t=5 and t=9 to determine if the two expressions are equivalent. we have to choose the correct statement.

First exp: 4(2t-5)

Substitute

t=5: 4(2(5)-5)=4(10-5)=20

t=9: 4(2(9)-5)=4(18-5)=4(13)=52

Second exp: 10t-38

t=5: 10(5)-38=50-38=12

t=9: 10(9)-38=52

Both expressions are equivalent when t=9, but the two expressions are not equivalent.

Hence, correct option is C