A store sells memory cards for $25 each. A) The markup for each memory card is 25. How much did the store pay for 50 memory cards? B) The store offers a discount when a customer buys 2 or more memory cards. A customer pays $47.50 for two memory cards. What is the percent of discount? C) How much does a customer pay for three memory cards if the store increases the percent of discount in part b by 2%? Please help! (explination as well please!) :)​

x = 3 ± √(5+y)

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?

step-by-step explanation: