Answer:
3
Step-by-step explanation:
QC=2x
RC=3x
QR=15
THEREFORE,
QC+RC=QR
=>2x+3x=15
=>5x=15
=>x=15/5
=>x=3
b i think
19) 340-76= 264 ft
20) -320+23 = -297 F
21) 50-85-12+93 = 46 points
22) 26-5-2+1-6 = 14$
23) -3 + 18 = 15 F
y = 10(3)x