Who can help a girl out with some math problems

A rectangle has a length of x + 2, a width of 7, and a perimeter of 32.

The value of x is ?.

It costs 4.25 for 1 pound of roast beef. how much will it cost to purchase 2.5 pounds of roast beef? round to nearest cent

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?