Answer:
40
Step-by-step explanation:
There are 90 two digit numbers
Solve both equations for y:

Set the expressions equal to each other:

So, for every nonzero number a the system of equations has
one solution.
Answer:
Lower and upper quartiles
Step-by-step explanation:
The box starts at lower quartile, ends at upper quartile
Answer: y=2
Step-by-step explanation:
combine like terms 2+ -4 = .2 1y= -2
divide each side my 1 then simplifying y=2