Andrew = t and bailey =2t
5/t+5/2t=1
2t=5+10
t=7.5,
andrew= 7.5 days and bailey = 15 days
andrew=
4. The equation is an exponential function where all y coordinates are above 4 (range is y>4), so for y=4 (answer D) there are no solutions. y=4 is the asymptote.
5. In a formula ax^2 + bx + c the discriminant is b^2-4ac. In this example the discriminant is 9-4*3*6 = -63. The fact that this value is negative reveals that this equation has no (real) solutions, only imaginary.
6. y=2x^2-x-5. Trial and error.
Factored completely means ALL common factors have been taken out. Ann factored it correctly 2(x-2)(2x+1)
Rounded to the nearest tenth, it’s 3.9.
Rounded to the nearest whole number, it’s 4.
(not specified in question)