Answer:
[(a)^2-(4^2)](a+4)
Step-by-step explanation:
Answer:
The angle complies with the state regulations.
Step-by-step explanation:
The angle of elevation is the angle
in the figure, and from trigonometry we find that

taking the inverse sine of both sides we get

which gives

which is less than 5°, and therefore is well within the state regulations.
Answer:need graph
Step-by-step explanation:
Answer:
63.
Step-by-step explanation:
49 plus 37 is 86. subtract that by 23 and you get 63.
Answer:
8 pounds of 4% solution of borax
Step-by-step explanation:
Let x be the 4% solution
24 pounds of 12% solution
obtain a 10% solution of borax that is (x+24) pounds
4% is 0.04 and 12% is 0.12 , 10% is 0.1

solve the equation for x

so 8 pounds of 4% solution of borax