Answer:
Step-by-step explanation:
<u>Given vertices of triangle:</u>
- A(1, 2), B(3, 4), C(5, 0)
<u>The centroid is found as the average of x- and y- coordinates of three vertices:</u>
- C = ((x₁ + x₂ + x₃)/3, (y₁ + y₂ + y₃)/3)
<u>Substitute the coordinates into formula:</u>
- C = ((1 + 3 + 5)/3, (2 + 4 + 0)/3) = (3, 2)
Correct choice is B
We are given the system of equations -:
![\large{ \begin{cases} 2x + 3y = - 14 \\ y = 6x + 22 \end{cases}}](https://tex.z-dn.net/?f=%20%5Clarge%7B%20%5Cbegin%7Bcases%7D%202x%20%2B%203y%20%3D%20%20-%2014%20%5C%5C%20y%20%3D%206x%20%2B%2022%20%5Cend%7Bcases%7D%7D)
Since the second equation is y-isolated equation. It can be substituted as y = 6x+22 in the first equation.
![\large{2x + 3(6x + 22) = - 14}](https://tex.z-dn.net/?f=%20%5Clarge%7B2x%20%2B%203%286x%20%2B%2022%29%20%3D%20%20-%2014%7D)
Expand 3 in the expression so we can combine like terms and isolate x-variable.
![\large{2x + 18x + 66 = - 14}](https://tex.z-dn.net/?f=%20%5Clarge%7B2x%20%2B%2018x%20%2B%2066%20%3D%20%20-%2014%7D)
Then combine like terms.
![\large{20x + 66 = - 14}](https://tex.z-dn.net/?f=%20%5Clarge%7B20x%20%2B%2066%20%3D%20%20-%2014%7D)
Get rid of 66 from the left side by subtracting both sides by itself.
![\large{20x + 66 - 66 = - 14 - 66} \\ \large{20x = - 80}](https://tex.z-dn.net/?f=%20%5Clarge%7B20x%20%2B%2066%20-%2066%20%3D%20%20-%2014%20-%2066%7D%20%5C%5C%20%20%5Clarge%7B20x%20%3D%20%20-%2080%7D)
To finally isolate the variable, divide both sides by 20 so we can leave x only on the left side.
![\large{ \frac{20x}{20} = \frac{ - 80}{20} }](https://tex.z-dn.net/?f=%20%5Clarge%7B%20%5Cfrac%7B20x%7D%7B20%7D%20%20%3D%20%20%5Cfrac%7B%20-%2080%7D%7B20%7D%20%7D)
Simplify to the simplest form.
![\large{x = - 4}](https://tex.z-dn.net/?f=%20%5Clarge%7Bx%20%3D%20%20-%204%7D)
Normally, we have to find the y-value too but since we only find x-value. The answer is x = -4.
Answer
I hope this helps! If you have any questions or doubts regarding my answer, explanation or system of equations, feel free to ask!
2014⇒2277 athletes
2013⇒2070 athletes.
x=number of athletes in 2013
110% of x=2277
(110/100x=2277
x=(2277*100)/110=2070
2012⇒2300 athletes.
x=number of athletes in 2012
90% of x=2070
(90/100)x=2070
x=(2070*100)/90=2300
Answer: 2300 athletes were signed up for a spring sport in 2012.
Answer:
-144m^11n^3
Step-by-step explanation:
-(6m^3)^2 x 4m^5n
-36m^6n^2 x 4m^5n
Answer:
-144m^11n^3
Hello!
You first find out how many objects there are in total
4 + 9 + 3 = 16
Then you find the probability of Liliana picking a orange
Since there are 4 oranges and 16 things to pick she has a 4/16 chance of getting an orange
Next you find the probability of Liliana picking a pear
There are 3 pears and 16 items to pick so she has a 3/16 chance
Then you add them together to find the chance of either happening
4/16 + 3/16 = 7/16
So she has a 7 out of 16 chance of getting an orange or a pear
The answer is 7/16
Hope this helps!