The rule for being the nth item in a certain sequence is n(n+1)/2. what is the 4th term in this sequence ? a.) 4
b.)10
c.)16
d.)20​

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

X+ y = 5 ; x - y =3 solve using linear combination