What is the best estimate for the value of the expression? Pease chose one of the answers below! (34/8 - 16/3) = 14/9

1. -3
2. -2 1/2
3. 7
4. 7 1/2

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Which equation can be used to solve for the unknown number? seven less than a number is thirteen. n-7=13 7-n=13 n+7=13 n+13=7

Can someone me out here number 4 plz

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units