which number sentence is true?
a. -1.5 + (-0.5) = 2.0
b. 2.5 + (-1.5) = 1.0
c. -1.5 + (-0.5) = -1.0
d. -2.5 + 3.5 = -1.0

B
please try a lot harder if you can't get this

Dbc if u do the math and stuff that what i got let me know if i was wrong

Hello! i hope this
since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.