Find the errors and correct the following mathematical sentences.​

Need to increase the numbers of customers i talk to daily by 20% how many customers do i need to talk to if i talk to a average of 8 customers per hour during an 8 hour shift

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8