In △abc, point m is the midpoint of ac , point d∈ bm so that md: db=1: 4. if acmd=7 ft2, find abdc, aamb, and aabc.

Note that

Let H be the height of triangle ABC. Since then

1.

2. M is midpoint of AC, then AM=MC.

3.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

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