When x=−1 and y=−2 , how do the two expressions compare? when x= -1 and y= -2 => < 3x−y2 (x+y)2+y

Step-by-step explanation:

3(-1) - (-2)2 = (-1 + (-2))2 + (-2)

-3 - (-4) = (-1 - 2)2 - 2

-3 + 4 = (-3)2 - 2

1 = -6 - 2

1 = -8

Their answer is different after substitution.

3x - y2 has an answer that is 1 while (x + y)2 + y has an answer of -8.

(x + y)2 + y does not have a 3 in it like the first equation 3x - y2.

x and y are in parentheses in (x + y)2 + y and the equation 3x - y2 aren't.

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.

the photograph is photographer and- in the process- ourselves.

step-by-step explanation: