Each small kite costs $4, while each large kite costs $7. If the total money collected selling kites is $150, and 30 kites are sold, which system of equations can be used to find out how many of each size kite are sold?

Let s be the number of small kites and let l be the number of large kites.

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy

answer: none of these answers are correct only the second half is

step-by-step explanation:

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?