Answer: choice 1 and 6
Step-by-step explanation:
just plug in 9 for every X making sure they equal each other.
Answer:
Step-by-step explanation:
1: GCF (72, 144, 180) = 36
2: GCF of 10 and 13 is 1.
3: GCF of 135, 45, and 25 is 5
4: GCF of 150 and 225 is 75
Answer:
the number of single room is 27 and the number of double room is 53
Step-by-step explanation:
Let x is the number of single room
Let y is the number of double room
We know that:
x + y = 80 <=> x = 80 -y (1)
80x +90y= 6930 (2)
Substitute (1) in (2) we have:
80 (80 - y) + 90y = 6930
<=> 6400 - 80y +90y = 6930
<=> y = 53
> x = 80 - 53 = 27
the number of single room is 27 and the number of double room is 53
Surface=2(5 x 4)+2(4 x 7)+2(5 x 7)=2(20)+2(28)+2(35)=40+56+70=166
Answer: 166 cm²
