D because its a triangle so it would be 3x but then you have to add the 4 for the longer side.
Multiply everything in the parenthesis by a.
ac + ab = d
Subtract ab from both sides.
ac = d - ab
Divide a on both sides.
c = d - ab / a
Hope this helps!
34 x 17 = 28 +210+40 + 300=578
Answer: 500 calories
Set them as proportions
375/46=x/60
Multiply 60 to each side to eliminate fraction
Then you’ll get x=500
