Answer:
1+sq root 3/2 or 1+1.732/2
Step-by-step explanation:
sin 30°=1/2
cos 30°= under sq. root 3/2
so
sq root 3= 1.732
I used a graphing calculator for this.
The solution my calculator got was:
(-2.625, 0.688) My calculator is very accurate, I don't think the test expects it to be like that.
Let's find the closest coordinates.
"B" is the closest.
I hope this helps!
~kaikers
Answer:
![x = -20](https://tex.z-dn.net/?f=x%20%3D%20-20)
Step-by-step explanation:
Use inverse operations and simplification to isolate the variable in the equation.
![-\frac{2}{5}x + 7 = 15\\-7\\\\-\frac{2}{5}x = 8\\](https://tex.z-dn.net/?f=-%5Cfrac%7B2%7D%7B5%7Dx%20%2B%207%20%3D%2015%5C%5C-7%5C%5C%5C%5C-%5Cfrac%7B2%7D%7B5%7Dx%20%3D%208%5C%5C)
Now divide the equation by
remember, dividing a fraction is the same as multiplying by the reciprocal. The reciprocal of a fraction is when one switches the places of the numerator (number on top of a fraction bar), and the denominator (number on the bottom of the fraction bar).
![-\frac{2}{5}x = 8\\](https://tex.z-dn.net/?f=-%5Cfrac%7B2%7D%7B5%7Dx%20%3D%208%5C%5C)
÷![-\frac{2}{5}](https://tex.z-dn.net/?f=-%5Cfrac%7B2%7D%7B5%7D)
![x = 8 * (-\frac{5}{2})](https://tex.z-dn.net/?f=x%20%3D%208%20%2A%20%28-%5Cfrac%7B5%7D%7B2%7D%29)
Simplify,
![x = 4 *(- 5)\\\\ x= -20](https://tex.z-dn.net/?f=x%20%3D%204%20%2A%28-%205%29%5C%5C%5C%5C%20x%3D%20-20)