To prove a rhombus you need to show that the sides are congruent and the diagonals are perpendicular.
Sides:
















≅
≅
≅ 
Diagonals:
Use the slope formula: 


= -1


= 1
Slopes are opposite reciprocals so they are perpendicular.
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All of the sides are congruent and the diagonals are perpendicular so RMBS is a rhombus.
The x intersect is at 2,5 and the y intersect is at -1,5
2,5 + (-1,5) = 1
The answer should be the first option.
The first option says that the sum of x + y = more or the equal than 1.
Hope it helped!
Chrystelle bought 2/3 pound of ham. (given)
She bought 3/5 * 2/3 = 2/5 pound of cheese.
The cheese cost 4.95 per pound, so she paid 2/5*4.95 = 1.98 for the cheese.
The ham cost 5/3 * 4.95 = 8.25 per pound, so she paid 2/3*8.25 = 5.50 for the ham.
Her total purchase was 1.98 +5.50 = 7.48 for the ham and cheese.
Selections B, C, E are correct.
Answer: 1st one
Step-by-step explanation: