Answer:
Step-by-step explanation:
x²+10x+21=0
x²+10x+(10/2)²-(10/2)²+21=0
x²+10x+25-25+21=0
(x+5)²-4=0
(x+5)²=4
(x+y)²=(x+y)(x+y)=x(x+y)+y(x+y)=x²+xy+xy+y²=x²+2xy+y²
(x+y)²=x²+2xy+y²
coefficient of x=2y
y²=[(coefficient of x)/2]²=(2y/2)²=y²
X+x+3x= 180
5x= 180
x= 36
3(36)= 108
Your answer is D. $108
Answer:
tenth is 14.7 whole number is 15 hundredth is 14.76
Answer:
60
Step-by-step explanation:
13-9=4
6=4=10
18/3=6
6*10=60
