Hiroshi spends 30 minutes on history homework, 60 minutes on english homework, and x minutes on math homework. one fourth of his total homework time is spent on math. which equation can be used to find the amount of time hiroshi spends on his math homework?
a. 1/4(x + 30 + 60) = x
b. 1/4(x) = x(30 + 60)
c. 1/4x(30 + 60) = x
d. 1/4(x) = (30 + 60)

Find and simplify the difference of the golden ratio and its multiplicative inverse

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.