Can someone help me pls i need the answer to pass pls. 80 points and ill give you brainliest

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?