If two rational numbers, a and b, are ordered such that a is less than b, then what much be true about the order for their opposites: -a and -b?

Pelle's sister is three years older than pelle the father is 5 times as old as pelle the mother was 28 when the sister was born altogether they are 98 years old how old is pelle?

Which inequality has a dashed boundary line when graphed ?

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11