15 is compostit bevuasw (3x5=15) (1x15)
A is aldult tickets
b is child tickets
b = 2/3 a
7a + 12b = 90
7a + 12 x 2/3 a = 90
7a + 8a = 90
15a = 90
a = 6; b = 4
Answer:
Step-by-step explanation:
1)down 8 up 10
2)11.2
3)9+9+9+9+9=45
4)middle
5)77.0
P=2(l+w)
50=2(4+w)
50=8+2w
collect the like terms 50-8=2w
42=2w divide both sides by 2
w=21
Answer:
x=-3
Step-by-step explanation:
-7-4(2x-1)=21
-7-8x+4=21
-7+4-8x=21
-3-8x=21
8x=-3-21
8x=-24
x=-24/8
x=-3