Is is true or false that all relations are functions, and all functions are relations?

Ben is greeting customers at a music store. Of the first 20 people he sees enter, 13 are wearing jackets and 7 are not. What is the experimental probability that the next person to enter the store will be wearing a jacket is

5 t-shirts and a hat costs £27.00 2 t-shirts and a hat costs £12.00. How much does a t-shirt cost? How much does a hat cost?

Given that abcd is a parallelogram and opposite sides ab¯ and cd¯ have lengths of 4y and y+42, respectively, what is the value of y?

Explain the additive and multiplicative inverse properties of number accurately.

If you punch a wall with a force of 30 N, what force will you feel in your fist?

How many boxes can a machine pack in 25 min if the machine packs boxes at a rate of 50 boxes per minute? Enter your answers into the boxes. w = rt w = boxesminboxesmin ⋅· min w = boxes

How much candy at $1.16 a pound should be mixed with candy worth 86 cent a pound in order to obtain a mixture of 60 pounds of candy worth a dollar a pound?

2 + 2 + 6 / 9 ^2 + 600 + 2400 + 45 - 42

What is the answer to 1/2 (x + 4) =

Is it possible to construct a triangle with side lengths of 13mm 25mm 14mm?