Answer:
21.98
Step-by-step explanation:
7*3.16=21.98
Answer:
x=-12,y=3
Step-by-step explanation:
1/2x+6y=12
y=x+15
since y=x+15
substitute y in first equation, we have
1/2x+6(x+15)=12
open the bracket
1/2x+6x+90=12
1/2x+6x=12-90
x/2+6x= -78
13x/2=-78
13x=2×-78
x=-12
Now x=-12, put x=-12 in the second equation, we have
y=x+15
y=-12+15
y=3
hope it helps
Answer:
.
Step-by-step explanation:
Speed =wavelength x frequency
= 2x1.5 = 3m/s
Answer:
3
Step-by-step explanation:
-5 + (5 + 3)
-5 + 8
3
