What value of m makes the statement true? –(m + 15) = –18 + (–15) a. –33 b. –18 c. 3 d. 18

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need