Ineed , i don’t understand what i’m supposed to do

Step-by-step explanation:

For a, you need to plugin -9 into the equations inside the boxes and solve.

y = x^2 + 3, y = 9^2 + 3, y = 81 + 3, y = 84.

y = √x - 2, y = √9 - 2, y = 3 - 2, y = 1.

For b, It's only possible for the second equation to output 0, as for the first, it's impossible for x^2 to equal -3 and add to 3 to get 0. For the second equation you can plug in 4 to get 2 - 2, which gives 0.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.