NEED HELP WITH THIS!

See below

Step-by-step explanation:

a.

To solve for h, we want to use algebraic properties to isolate h.

               [multiply both sides by 2]

                [divide both sides by b₁+b₂]

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b.

To solve for b₂, we first multiply both sides by 2. Then, we divide both sides by h. This leaves us with . To get b₂, you subtract both sides by b₁.

h=2A/(b1+b2)

and

b2=2A/h-b1.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: