Hi I need help for my math class it’s due Saturday!

The mass of riboflavin in one small serving (75 g) of raw almonds is 0.87 mg less
than the mass of riboflavin in 21 small servings of raw almonds. What is the mass 2
of riboflavin in one small serving of raw almonds?
a) Write an equation that models the situation.
b) Solve the equation using guess and check.
c) Solve the equation by isolating the variable

Asap for seven months an ice creams vendor collects data showing the number of cones sold a day (c) and the degrees above 70 degrees f the vendor finds that there is a positive linear association between c and t that is the best modeled by this equation c=3.7t+98 which statement is true? the model predicts that the average number of cones sold in a day is 3.7 the model predicts that the average number of cones sold i a day is 98 a model predicts that for each additional degree that the high temperature is above 70 degres f the total of number of cones sold increases by 3.7 the model predicts for each additional degree that the high temperature is above 70 degrees f the total number of cones sold increasingly by 98

Regular price 75$ discount 25%sale price?

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers