The sum of the magnitudes will be the magnitude of the sum when the vectors have the same direction.
Part A
Distribute the one-half.
1.24g + 0.87m + 0.98z
Part B
(29.68 - x) + 14.45
Or simplified to 44.13 - x
Part C
a = number of times at the store
b = gloves' price
c = hat's price
WHAT IS PERCENT DO THE PERCENT CHANT! SPREAD THIS
Try googling this it will give you some examples and definitions.
https://mathbitsnotebook.com/Geometry/SegmentsAnglesTriangles/SATTriangleTypes.html