4m + 18 is called a What expression

Constant
Term
Variable expression
Coefficient

Does the construction demonstrate how to copy an angle correctly using technology a) yes the distance between points a and f was used to create circle h b) yes the distance between points f and g was used to create circle h c) no the distance between points a and f was used to create circle h d) no the distance between points f and g was used to create circle h

Which equation represents h for right triangle abc

Which expression is equivalent to 64 - 9x^2?