Just 3 questions, ! in 1. the solution x = 8 is a solution to which of the following equations? a. x over 8 = 64 b. x over -2 = -4 c. 2 = x over 8 d. -64 = x over -8 2. what is the value of a in the equation 7a - 89 = 72? a. 154 b. -24 c. -10 d. 23 3. what is the value of x in the equation 5x - 2 = 18? a. -10 b. -9 c. 4 d. 7

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Math each whole number with a rational, exponential expression

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?