I think the answer is 300 because 4 is less tvhan 5 and when you round numbers, if the number is less than you leave it or if it is 5 or more you add one more.
Sydney’s age is 50.
Devaughn age: x-15 Sydney’s age: x
x-15+x = 85
2x-15 = 85
2x = 100
x = 50
The answer is 49 because x = 1/7 and 1/7^-2 =49
