Answer:
b=2
Step-by-step explanation:
we have
9x+12y=21 -----> equation A
6x+8y=7b ----> equation B
we know that
If the system of equations have an infinite number of solutions then the equation A must be equal to the equation B
Multiply equation B by 1.5 both sides
1.5*[6x+8y[=7b*1.5
9x+12y=10.5b ----> equation C
Compare equation A and equation C
9x+12y=21 -----> equation A
9x+12y=10.5b ----> equation C
For the equations to be equal it must be fulfilled that
21=10.5b
solve for b
b=21/10.5
b=2
Multiply the base × height to find the area of each
Let a be the ticket:
So, plugging in our details:
a + (2 x 0.5a) = 35
2a = 35
a = 17.5 this is the price per each adult.
And through checking:
x + 3x = 35
4x = 35
x = 8.75
So for the first given:
1 adult + 2 children
17.5 + 17.5 = 35
So for the second given:
17.5 x 2 = 35
8.75 x 3 = 26
= 61, there is an excess of 1 dollar. Maybe there is a
discount if there are 3 children. By trial and error. It can be 8.30 x 3 = 24.9
or 25 + 35 = 60
Answer: The total power radiated is 11.51 W.
Step-by-step explanation:
Since we have given that
Distance away from a siren = 4.72 m
Intensity of sound = 
As we know the relation between power, intensity and area.
So, it becomes,
Hence, the total power radiated is 11.51 W.
I got you
Try to multiply the rote number which would be 60+40-7=93
<em>Have a great day!</em>
