this is for 10 !
5x + 3y = 15 for y when x = 0

Daniel bought a computer game for $25 and later sold it to thomas for a 40% profit. how much did daniel sell the computer game for?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?