What value of a makes the equation true? !

1.7a+0.3a=45

a. a=25

b. a=245

c. a=−115

d. a=135

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Determine the solution for mc001-1.jpeg