Enrique and sadie took a total of 122 photos while they were on vacation. if enrique had 20 more than half the number of photos on his cell phone than sadie had on her cell phone, how many photos were on sadie’s cell phone ?

Simba travel agency arranges trips for climbing mount kilimanjaro. for each trip, they charge an initial fee of \$100$100 in addition to a constant fee for each vertical meter climbed. for instance, the price for climbing to the shira volcanic cone, which is 30003000 meters above the base of the mountain, is \$400$400. let f(d)f(d) denote the fee of a trip ff (measured in dollars) as a function of the vertical distance climbed dd (measured in meters). write the function's formula. f(d)=