Question 1189657
The triangle has 3 equal sides of 10 cm for a perimeter of 30 cm
The rectangle has 2 sides of x and 2 sides of x+3 for a perimeter of 4x+6=30 cm
So x, the length of the short side, is 6 cm and the long side is 9 cm.
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x miles first day
x+200 on second day
x-75 on third day
add them: 3x+125=1058
3x=933
x=311 miles first day
x+200=511 miles second day
x-75=236 miles third day
They add to 1058 miles