Which of these is not a possibe r-value?
a.1.75
b.-0.1
c.0.2
d.-0.5

What expression is equivalent to 42x-56y

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

Which expression is equivalent to (5x^7+7x^8) − (4x^4−2x^8)? a. 9x^8 + 5x^7−4x^4 b. 3x^8 + 7x^7 c. 12x^8 − 2x^4 d. 5x^8 + 5x^7 + 4x^4