Answer:
60
Step-by-step explanation:
The yellow and green angles form a right angle, so the measures of those combined will be 90 degrees.
90 - 30 = 60
Answer:
Step-by-step explanation:
x^2 + 48^2 = 50^2
x^2 + 2304 = 2500
x^2 = 196
x = 14
answer is a
The product of 12 and -5 is -5(12) = -60. Note that 12(-5) = -60 also.
Answer:


Step-by-step explanation:
Let


Currently:

Two years ago

Required
H and B
We have:

Open bracket

Add 2 to both sides


Substitute 

Collect like terms


Substitute
in 



I believe you haven't included the system of equations for us to solve.
However, I will tell you that you need to solve for one variable in an equation and substitute that into the other equation.
For example:
x = yz; z = x/y
a = zb; a = (x/y)b
Hope this helps!