Each of the four angels of a quadrilateral 90°. How many rectangles can you construct using this condition? 0 1 2 4, or infinitely many.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are

step-by-step explanation:

its 512 because parenthesis and to the 2nd power is 512 so it will be 512