Show that 1/2 is equivalent to 4/8 using a tape diagram and a number Sentence

7x+8y=-18, 4x-9y=-3 solve the system of equations

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?