In parallelogram ABCD, XB = (2x +15)
and XC = x. Find x.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Abox of chocolates costs $7. which equation relates the number of boxes sold (x) and total cost of the boxes sold (y)?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?