Yo sup??
let the number of pencils and pens be 8x and 14x
x=2
therefore the number of pens and pencils are
16 pencils and 28 pens
Hope this helps
Answer:
A. Square for Ape.x
Step-by-step explanation:
I hope this helps you
when y=14 x=20
y=3,5 x=?
?.14=20.3,5
?=20.3,5/14
?=5
The length of a segment is the distance between its endpoints.
![\mathbf{AB = 3\sqrt{2}}](https://tex.z-dn.net/?f=%5Cmathbf%7BAB%20%3D%203%5Csqrt%7B2%7D%7D)
- AB and CD are not congruent
- AB does not bisect CD
- CD does not bisect AB
<u>(a) Length of AB</u>
We have:
![\mathbf{A = (1,2)}](https://tex.z-dn.net/?f=%5Cmathbf%7BA%20%3D%20%281%2C2%29%7D)
![\mathbf{B = (4,5)}](https://tex.z-dn.net/?f=%5Cmathbf%7BB%20%3D%20%284%2C5%29%7D)
The length of AB is calculated using the following distance formula
![\mathbf{AB = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}}](https://tex.z-dn.net/?f=%5Cmathbf%7BAB%20%3D%20%5Csqrt%7B%28x_1%20-%20x_2%29%5E2%20%2B%20%28y_1%20-%20y_2%29%5E2%7D%7D)
So, we have:
![\mathbf{AB = \sqrt{(1 - 4)^2 + (2 - 5)^2}}](https://tex.z-dn.net/?f=%5Cmathbf%7BAB%20%3D%20%5Csqrt%7B%281%20-%204%29%5E2%20%2B%20%282%20-%205%29%5E2%7D%7D)
![\mathbf{AB = \sqrt{18}}](https://tex.z-dn.net/?f=%5Cmathbf%7BAB%20%3D%20%5Csqrt%7B18%7D%7D)
Simplify
![\mathbf{AB = 3\sqrt{2}}](https://tex.z-dn.net/?f=%5Cmathbf%7BAB%20%3D%203%5Csqrt%7B2%7D%7D)
<u>(b) Are AB and CD congruent</u>
First, we calculate the length of CD using:
![\mathbf{CD = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}}](https://tex.z-dn.net/?f=%5Cmathbf%7BCD%20%3D%20%5Csqrt%7B%28x_1%20-%20x_2%29%5E2%20%2B%20%28y_1%20-%20y_2%29%5E2%7D%7D)
Where:
![\mathbf{C = (2, 4)}](https://tex.z-dn.net/?f=%5Cmathbf%7BC%20%3D%20%282%2C%204%29%7D)
![\mathbf{D = (2, 1)}](https://tex.z-dn.net/?f=%5Cmathbf%7BD%20%3D%20%282%2C%201%29%7D)
So, we have:
![\mathbf{CD = \sqrt{(2 -2)^2 + (4 - 1)^2}}](https://tex.z-dn.net/?f=%5Cmathbf%7BCD%20%3D%20%5Csqrt%7B%282%20-2%29%5E2%20%2B%20%284%20-%201%29%5E2%7D%7D)
![\mathbf{CD = \sqrt{9}}](https://tex.z-dn.net/?f=%5Cmathbf%7BCD%20%3D%20%5Csqrt%7B9%7D%7D)
![\mathbf{CD = 3}](https://tex.z-dn.net/?f=%5Cmathbf%7BCD%20%3D%203%7D)
By comparison
![\mathbf{CD \ne AB}](https://tex.z-dn.net/?f=%5Cmathbf%7BCD%20%5Cne%20AB%7D)
Hence, AB and CD are not congruent
<u>(c) AB bisects CD or not?</u>
If AB bisects CD, then:
![\mathbf{AB = \frac 12 \times CD}](https://tex.z-dn.net/?f=%5Cmathbf%7BAB%20%3D%20%5Cfrac%2012%20%5Ctimes%20CD%7D)
The above equation is not true, because:
![\mathbf{3\sqrt 2 \ne \frac 12 \times 3}](https://tex.z-dn.net/?f=%5Cmathbf%7B3%5Csqrt%202%20%5Cne%20%5Cfrac%2012%20%5Ctimes%203%7D)
Hence, AB does not bisect CD
<u>(d) CD bisects AB or not?</u>
If CD bisects AB, then:
![\mathbf{CD = \frac 12 \times AB}](https://tex.z-dn.net/?f=%5Cmathbf%7BCD%20%3D%20%5Cfrac%2012%20%5Ctimes%20AB%7D)
The above equation is not true, because:
![\mathbf{3 \ne \frac 12 \times 3\sqrt 2}](https://tex.z-dn.net/?f=%5Cmathbf%7B3%20%5Cne%20%5Cfrac%2012%20%5Ctimes%203%5Csqrt%202%7D)
Hence, CD does not bisect AB
Read more about lengths and bisections at:
brainly.com/question/20837270
85 is the correct answer.