15(x + 1) + 10(x) = 30(4) - 6( 2x - 1) <em>multiplied by 30 to clear the denominator</em>
15x + 15 + 10x = 120 -12x + 6 <em>distributed</em>
25x + 15 = 126 - 12x <em>added like terms</em>
37x + 15 = 126 <em>added 12x to both sides</em>
37x = 111 <em>subtracted 15 from both sides</em>
x = 3 <em>divided both sides by 37</em>
Answer:
The percentage of fat in the mixture is 8%
Step-by-step explanation:
Let
x -----> the percentage of fat in the mixture
we know that
The volume of milk multiplied by its percentage of fat plus the volume of cream multiplied by its percentage of fat must be equal to the total volume of he mixture multiplied by the percentage of fat in the mixture
Remember that
15%=15/100=0.15
3%=3/100=0.03
so
Solve for x
Convert to percentage
Answer:
Then this is the expected price for the weekly shipment of rats =13.25
Step-by-step explanation:
Suppose the price for the shipment of rats are as follow
price 10 12.50 15
and probability may be
0.2 0.3 0.5
then the expected value is equal to
=10* 0.2 + 12.50 *0.3 + 15 *0.5
=13.25
then this is the expected price for the weekly shipment of rats
A: 39 over 50000
b: 20003 over 10000