Chris placed an order for 30 chairs with the furniture store. He ordered metal chairs at $25 each and plastic chairs at $10 each. His order totaled $450. How many of each chair did he order?

10 metal and 20 plastic

Step-by-step explanation:

10 x 25 is 250, 20 x 10 is 200 and 250 + 200 is 450

(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

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation: