Answer:
70
Step-by-step explanation:
because 70 times 6 equals 420
Answer:
40 quarts.
Step-by-step explanation:
Let x =quarts of the 50% solution
so, according to the question
the typical mixture equivalent equation will be like this

so the answer will be 40 quarts of 50% solution should be added.
Answer:
y = -19
Step-by-step explanation:
Answer:
96
Step-by-step explanation:
If we draw a line from the vertex to the midpoint of the base we get 2 right angled triangles. So we can use Pythagoras theorem to find the length ( height):-
20^2 = x^ + 5^2
x^2 = 400 - 25 = 375
x = sqrt 375 = 19.36 cm to nearest hundredth.