What is 10-(3×2^2-23)/(1+10^2)-2^2×5^2 in simplest form

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?