Then...
8x+y=12
8x+3 = 12
-3 -3
---- ----
8x = 9
---- ----
8 8
x = 9/8
Hope this helps! :) Good luck
Answer:
NC = 7.7
C = 63.6°
T = 26.4°
Step-by-step explanation:
✔️Apply pythagorean theorem to find the length of NC:
NC = √(17.2² - 15.4²) = √58.68
NC ≈ 7.7
✔️Apply trigonometric function to find Angle T:
Reference angle = T
Hypotenuse = 17.2
Adjacent length = 15.4
Apply CAH, thus:
![Cos(T) = \frac{Adj}{Hyp}](https://tex.z-dn.net/?f=%20Cos%28T%29%20%3D%20%5Cfrac%7BAdj%7D%7BHyp%7D%20)
![Cos(T) = \frac{15.4}{17.2}](https://tex.z-dn.net/?f=%20Cos%28T%29%20%3D%20%5Cfrac%7B15.4%7D%7B17.2%7D%20)
![T = cos^{-1}(\frac{15.4}{17.2})](https://tex.z-dn.net/?f=%20T%20%3D%20cos%5E%7B-1%7D%28%5Cfrac%7B15.4%7D%7B17.2%7D%29%20)
T ≈ 26.4°
✔️C = 180 - (90 + 26.4) (sum of triangle)
C = 63.6°
Answer:
What does that mean? can you be a little more clear?
Answer:
Step-by-step explanation:
Given that:
Keiko sold 3 less than three-fourths of his sister's sale.
To find:
Expression that represents what Keiko sold ?
![1.\ \dfrac{3}{4} x - 3 \\2.\ \dfrac{3}{4} x + 3 \\ 3.\ 3 x + \dfrac{3}{4} \\4.\ 3x - \dfrac{3}{4}](https://tex.z-dn.net/?f=1.%5C%20%5Cdfrac%7B3%7D%7B4%7D%20x%20-%203%20%5C%5C2.%5C%20%5Cdfrac%7B3%7D%7B4%7D%20x%20%2B%203%20%5C%5C%203.%5C%203%20x%20%2B%20%5Cdfrac%7B3%7D%7B4%7D%20%5C%5C4.%5C%203x%20-%20%5Cdfrac%7B3%7D%7B4%7D)
Solution:
First of all, let the sales done by Keiko's sister = ![x](https://tex.z-dn.net/?f=x)
Now, let us consider the Keiko's sale word by word.
3 less than three-fourths of his sister's sale.
- Three fourth of his sister's sale i.e.
- 3 less
i.e. subtract 3 from the expression obtained in 1st line.
![\dfrac{3}{4}x-3](https://tex.z-dn.net/?f=%5Cdfrac%7B3%7D%7B4%7Dx-3)
So, sales done by Keiko = ![\dfrac{3}{4}x-3](https://tex.z-dn.net/?f=%5Cdfrac%7B3%7D%7B4%7Dx-3)
So, correct answer is:
![1.\ \dfrac{3}{4}x-3](https://tex.z-dn.net/?f=1.%5C%20%5Cdfrac%7B3%7D%7B4%7Dx-3)
If you're looking for Sam's age, the equation is 2x+5=3x-1. When solved, you get 6. Sam is 6.