The ratio of Zimba's current weight to his weight 3 years ago is 5 to 4. In pounds, what did Zimba weigh 3 years ago if he has gained 3.5 pounds since then?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?