Answer with explanation:
We have to evaluate the sum of all positive rational numbers that are less than 5, and that has a denominator of 30 when written in lowest terms.
Factors of 30 are=1,2,3,5,6,10,15,30.
So, all these fractions will begin from and has sum
Let x be the amount of neutral solution we need to add.
Since we have 40 fl of 5% local anesthesia solution, we have
fl of pure anesthesia.
After adding neutral solution, our new volume will be
. Remember that the concentration of the anesthesia after adding neutral solution should be 5%=0.05, and since the volume of the pure anesthesia won't change, we can relate all the values with the equation:
We can conclude that we will need to add 10 fl of neutral solution to our 40 fl of 5% anesthesia solution to get 50 fl of 4% anesthesia solution.
-8(x+13)=2(x-7)+4x
-8x-104=2x-14+4x
-8x-104=2x+4x-14
-8x-104=6x-14
Hope this can help.
Answer:
Total magic cakes =300
chocolate cakes =90
so if you want the percentage of chocolate you will divide the number of chocolate cakes over the total number of chocolates
% of chocolate cakes = 90/300×100%
=30%
Answer:
<ABC = 27
< BAC = 126
Step-by-step explanation:
<C = <B since it is an isosceles triangle. We know this since AC - AB
<C = 27 so <ABC = 27
The sum of the angles of a triangle = 180
A + B+ C = 180
A + 27+27 = 180
A + 54 =180
A = 180-54
A =126
< BAC = 126
