I'm honestly horrible at math, so if anyone could

B. 54 deg

Step-by-step explanation:

The sum of the measures of the angles of a triangle is 180 degrees. The triangle shown has one angle measuring 72 degrees. The other two angles have unknown measures, but they both measure y. Since the same variable y is used for both of the unknown angles, that means the two measures are equal.

We use the fact above about the sum of the measures to set up an equation.

y + y + 72 = 180

Add like terms.

2y + 72 = 180

Subtract 72 from both sides.

2y = 108

Divide both sides by 2.

y = 54

B. 54 deg

Check: 54 + 54 + 72 = 180, showing that 54 is correct.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

the answer would be d.

step-by-step explanation:

move all variables to the left side and all constants to the right side

(x−3)^2+(y−1)^2=16

this is the form of a circle. use this form to determine the center and radius of the circle.

( x − h ) 2 + ( y − k ) 2 = r 2

match the values in this circle to those of the standard form. the variable   r   represents the radius of the circle,   h   represents the x-offset from the origin, and   k   represents the y-offset from origin.

r = 4

h = 3

k = 1

the center of the circle is found at   ( h , k ) .

center:   ( 3 , 1 )

these values represent the important values for graphing and analyzing a circle.

center:   ( 3 , 1 ).

radius:   4