What number equals 75/100 because I’m very confused

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.