Answer:
please give me brainlist and follow
Step-by-step explanation:
You can think of independent and dependent variables in terms of cause and effect: an independent variable is the variable you think is the cause, while a dependent variable is the effect. In an experiment, you manipulate the independent variable and measure the outcome in the dependent variable.
I accept that θ in second quadrant, therefore sinθ > 0, cosθ < 0 and tanθ < 0.
![\cos\theta=-\dfrac{4}{7}\\\\We\ know:\sin^2x+\cos^2x=1\to\sin^2x=1-\cos^2x\to\sin x=\sqrt{1-\cos^2x}\\\\subtitute:\\\\\sin x=\sqrt{1-\left(-\dfrac{4}{7}\right)^2}=\sqrt{1-\dfrac{16}{49}}=\sqrt{\dfrac{33}{49}}=\dfrac{\sqrt{33}}{7}](https://tex.z-dn.net/?f=%5Ccos%5Ctheta%3D-%5Cdfrac%7B4%7D%7B7%7D%5C%5C%5C%5CWe%5C%20know%3A%5Csin%5E2x%2B%5Ccos%5E2x%3D1%5Cto%5Csin%5E2x%3D1-%5Ccos%5E2x%5Cto%5Csin%20x%3D%5Csqrt%7B1-%5Ccos%5E2x%7D%5C%5C%5C%5Csubtitute%3A%5C%5C%5C%5C%5Csin%20x%3D%5Csqrt%7B1-%5Cleft%28-%5Cdfrac%7B4%7D%7B7%7D%5Cright%29%5E2%7D%3D%5Csqrt%7B1-%5Cdfrac%7B16%7D%7B49%7D%7D%3D%5Csqrt%7B%5Cdfrac%7B33%7D%7B49%7D%7D%3D%5Cdfrac%7B%5Csqrt%7B33%7D%7D%7B7%7D)
We don't know much she used or had at the start
Answer:
768.75
Step-by-step explanation:
25%=1/4
1025/4= 256.25
1025-256.25=768.75