If d = 2, e = -3, f = 6, and g = 12, what is the value of (d + g) - (e + f) ?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.

Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue