Sound travels in waves. in dry air at 20 celsius ,sound travels about 343 meters in one second. how many meters will ,sound travels in 7 seconds?

it will travel 343m•7. this is 2401 meters.

it is x=-4

step-by-step explanation:

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2