Answer:
The specific gravity of kerosene is 0.82
Step-by-step explanation:
Let
x -----> the weight in grams of a cubic centimeter of Kerosene
y ----> the weight in grams of a cubic centimeter of water
z ---> the specific gravity of a substance
so
we have
substitute the values
The commutative property pf addition is a+b=b+a
Answer:
h=6
Step-by-step explanation:
since 
is an equation for a line which intersects with the curve 
. The point of intersection, let's say 
, should satisfy the two equations. As a result, the value of y in the second equation can be replaced with the value of y in the first equation as the following,
therefore, the latter equation can be rewritten in a quadratic equation form as the following,
= 0
if the line is tangent to the curve, it means that the line touches the curve at one point, therefore the discernment of the second order equation will be equal to zero for the famous quadratic equation solution.
where 
and 
, as a result, the following equations can be deduced,
therefore, dividing both sides by 12
Answer:
40
Step-by-step explanation:
The bread is 90.
28% is cookie
Then 72 %is bread and cake
Sum of bread and cake is 360
1%is 5 so cookie is 140
If sell 40 bread. Bread left is 50. Cake left is 150
Then cookie must be left 100 because the ratio of the no 1 is =to 50
Then need to sell 40 cookie so the ratio will be
50:150:100= 1:3:2
