Solve the system by substitution.
y=-x
y=4x+45
multiple choice.
,-9)
b.(9,-9)
c.(9.9)
,9)

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.