Answer:
C. 4.2a + 0.8
Step-by-step explanation:
Given:
The two binomials given for addition are:
and ![-1.2a-6.3](https://tex.z-dn.net/?f=-1.2a-6.3)
Now, adding both the binomials, we get:
![5.4a+7.1+(-1.2a-6.3)](https://tex.z-dn.net/?f=5.4a%2B7.1%2B%28-1.2a-6.3%29)
Distributing the positive sign inside the second binomial, we get:
![5.4a+7.1-1.2a-6.3](https://tex.z-dn.net/?f=5.4a%2B7.1-1.2a-6.3)
Now, combining like terms using the commutative property of addition, we get:
![(5.4a-1.2a)+(7.1-6.3)](https://tex.z-dn.net/?f=%285.4a-1.2a%29%2B%287.1-6.3%29)
Simplifying the above expression, we get:
![(5.4-1.2)a+0.8\\4.2a+0.8](https://tex.z-dn.net/?f=%285.4-1.2%29a%2B0.8%5C%5C4.2a%2B0.8)
Therefore, the resulting addition of the given binomials is ![4.2a+0.8](https://tex.z-dn.net/?f=4.2a%2B0.8)
Hence, option C is the correct answer.
Answer:
a
Step-by-step explanation:
V = 4/3 r^3 hope this helps I’m not sure if it’s right
The correct answer, rounded to the nearest km², is 2694.
Explanation:
This can be represented using an exponential equation of the form
y = a(1+r)ˣ, where y is the total amount, a is the initial population, r is the rate of increase or decrease written as a decimal number, and x is the amount of time.
In our problem, a = 4200, r = -8.5% = -8.5/100 = -0.085, and x is 5:
y = 4200(1+-0.085)⁵ = 4200(0.915)⁵ = 2693.73 ≈ 2694.
The volume of the pipe is about 282.6 cubic feet.
First, we need to find the area of each circular cross section and subtract them to find the width of the pipe. The area of a circle is pi(r^2).
pi(3^2) - pi(2^2)
28.26 - 12.56 = 15.7
The width of the pipe is 15.7. Now, multiply that by 18 to find the volume.
15.7 x 18 = 282.6