Please help with this math

The probability of winning something on a single play at a slot machine is 0.11. after 4 plays on the slot machine, what is the probability of winning at least once

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.

The amount cami raised during last year’s charity walk, $45.50, is 7/10 of the amount she raised this year. which equation represents n, the number of dollars she raised this year?