A square has a side length of 2x+5, write an expression to find the perimeter of the square.

8x+20

Step-by-step explanation:

4 identical sides to a square so if each side has 2x+5 we must have 4* that.

4(2x+5)=4*2x+4*5=8x+20

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47