Okay so we have this question of the week thing and this week our answer is 83 so i need a algebra problem that equals 83 can someone me ?

If 20% of a number is 35, what is 50% of that number?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense