Answer:
difference means subtraction operation.
let the number be n :

arrange the equation:

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further more [ getting value of n ]
add 7 on all sides:

divide all sides by 5:

2(x+9)=7
If you wanted to simplify;
2x+18=7 (Distributive Property)
2x=-11 (Subtraction Property of Equality)
x=-11/2 (Division Property of Equality)
Answer:
A. 1/2*b*h
Step-by-step explanation:
This is the area of triangles
Answer:
im pretty sure its 2
Step-by-step explanation:
You would divide 51 by 2 to get the answer, as the units are the same, for an answer of 25 two-thirds foot sized pieces, with 1 as a remainder.