The answer is = 2xy + 2x + 2y
172.50 times .065=11.2125
172.50+11.2125=183.7125
The total price is $183.71
Answer:
In a system, the substitution method is one of the 3 main ways to solve a system and can be very efficient at times.
<u>Skills needed: Systems, Algebra</u>
Step-by-step explanation:
1) Let's say we are given two equations below:

We can use substitution here by substituting in for
in the second equation. This means we put in
for
in the 2nd equation so we only have
variables in the equation, allowing us to solve for
.
2) Solving it out:

We essentially substitute in that value as seen in step 1. Steps 2 and 3 are just simplifying the left side and allowing for us to solve. Step 4 is where we divide by -16 on both sides to solve for x. Step 5 and 6 show us solving for y using the value for x. We get 
Answer: 37
Step-by-step explanation:
Well DCB is a right angle, and there is already half which is 53 degrees, subtract 90 by 53 and you will get your answer.
Answer:
6866, 71995
Step-by-step explanation:
I'm going to assume it has a growth rate of 160% per hour.
Anyways, since after four hours, there were 45,000 Bacteria X in the egg salad, we can write the following function:
, where P represents the initial amount, B(h) represents the total, and h represents the number of hours that has passed. The 1.6 represents the 160% growth rate per hour.
We already know that four hours has passed when the population is 45,000, thus:



So the initial population is around 6866.
After five hours, the number of bacteria will be: