What is the difference of the two polynomials?

(7y2 + 6xy) – (–2xy + 3)

Step-by-step explanation:

(7y² + 6xy) - (-2xy + 3)

⇒ (-1 * -2xy) + (-1 * 3) = 2xy - 3

7y² + 6xy + 2xy - 3

7y² + 8xy - 3  

Part 1) The least possible measure of angle ADC is 2 degrees

Part 2) The greatest possible measure of angle ADC is 178 degrees

Step-by-step explanation:

we know that

An acute angle is an angle that measures less than 90 degrees and greater than 0 degrees

Remember that

The two angles have the same whole number measure

so

The measure of angle ADC is equal to

---> by Addition Angle Postulate

so

The least possible measure of ADC is for

----> remember that is a whole number

so

The greatest possible measure of ADC is for

----> remember that is a whole number

so