48x0.2= $9.6
$48-9.6=$38.40 Her friend is incorrect.
40/48 =0.83 or about 83% So, in this case she only got 17% off. :)
<span>Hope I helped </span>
Answer:
![x=\frac{-5+\sqrt{13}}{6} or x=\frac{-5-\sqrt{13}}{6} (decimal: x=-0.23240 , x=-1.43425)](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-5%2B%5Csqrt%7B13%7D%7D%7B6%7D%20or%20x%3D%5Cfrac%7B-5-%5Csqrt%7B13%7D%7D%7B6%7D%20%28decimal%3A%20x%3D-0.23240%20%2C%20x%3D-1.43425%29)
Step-by-step explanation:
a = 3, b = 5, c = 1
plug into quadratic formula
Answer:
x = 16
Step-by-step explanation:
Given a tangent and a secant from an external point to a circle, then
The product of the external part and the whole of the secant is equal to the square of the tangent, that is
9(9 + x) = 15²
9(9 + x) = 225 ( divide both sides by 9 )
9 + x = 25 ( subtract 9 from both sides )
x = 16
Answer:
Multiply the coordinates of point P by the scale factor 7/4 to get the coordinates of P'.
Given : P(-5,3)
P' (x,y) = P (-5 x 7/4 , 3 x 7/4)
= P(-8.75, 5.25)
Step-by-step explanation: