The mass of a carbon atom is 1.994 × 10-23 grams. the mass of a hydrogen atom is 1.67 × 10-24 grams. what is the difference of their masses?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.