GRE
The total weight of sugar in R and S combined
3 times of the weight of sugar in M
The percent reduction on the total cost of 1 tie and 2 belts
25%
$$a^{2}$$+$$(\frac{1}{a})^{2}$$
3
$$x^{2}$$+$$\frac{1}{x^{2}}$$
25000 +道题目
245本备考书籍