What is the correct classification of the system of equations below? 2x+6y=8; y-2x=2

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Which of the following could be the ratio of the length of the longer leg 30-60-90 triangle to the length of its hypotenuse? check all that apply. a. 313 6 b. 3: 215 c. 18: 13 d. 1: 13 e. 13: 2 of. 3: 15

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)