Because base angles are congruent, both angle A and B are congruent. If the two triangles are congruent, then the base angles are the same, meaning 5x=50*. Divide by 10 and you get the answer of x=5. :) Hope this helps!
Answer:
MAD- 2
Step-by-step explanation:
Mean=7
15 gallons of 35% peroxide solution contains 0.35 × 15 = 5.25 gallons of hydrogen peroxide. The rest of the volume is made up of 15 - 5.25 = 9.75 gallons of water.
If we add 
gallons of water to the solution, the amount of hyrdrogen peroxide in the solution stays the same, but the volume of water increases to 
gallons, and the total volume increases to 
gallons.
To get a concentration of 8% in this diluted solution, we add gallons of water such that
Solve for .
To get the desired concentration, one must add 50.625 gallons of water, and one will end up with a total volume of 65.625 gallons of solution.
155/10,000 divided by 5
31/2000 =0.0155
COS(64°) = 3.2/x
multiply x to both sides to get COS(64°)x = 3.2
to get x by itself, divide 3.2 by COS(64°)
x = 3.2/COS(64°)
x=7.3
