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

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?