See the following table for the math scores of this semester (scores are all rounded): (1) Calculate the average score of Xiaoqing this semester.
(1) Xiaoqing's average grade this semester is: (88+70+96+86) ÷ 4 = 85; (2) According to the weight shown in the figure, Xiaoqing's comprehensive evaluation score this semester is: 85× 10%+85× 30%+60% X. According to the meaning of the question, it is 85× 10%+85× 30%+60% X = 90.