The measure of an angle is 30°. What is the measure of its complementary angle?

60

Step-by-step explanation:

60 because complementary angles add up to 90 if one is 30 the subrtract 30 from 90 and you get 60.

if this is really you s much. i only have 3 points left and i have 2 questions to ask

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".