25% of dogs at the park have tennis balls if 7 dogs have tennis balls how many dogs are at the park? ​

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

16x^2-16x=5 solve the equation by completing the square

Caitlin had 402. in her bank account. she withdrew $15.each week to pay for swimming lesson. she now has $237.