Answer:
9.4 yards
Step-by-step explanation:
If 7.3 yards of fabric are remaining, then Jennifer uses 82.5-7.3=75.2 yards of fabric.
Jennifer uses 75.2 yards of fabric to make 8 identical curtains, then
yards of fabric Jennifer uses per curtain.
(0,4) u (9, infinity)
why? you want to use parentheses because it says "less than" More than" not "4 or less" which would mean you use brackets because that includes the number
It will reflect the same distance over the Y axis, from the right side of the graph to the left side of the graph.
So hmmm if you notice y = x² - b is really just the parent function x² with a downward shift of "b". And y = - x² + b is really just x² upside-down shifted upwards by "b". so, both parabolas, look like the picture below, and their vertices is at the origin and then they get shifted, one upwards and the other downwards.
So the rhombus lies in their vertices and intersection points.
now, the area of the rhombus is 54, we're taking the green triangle in the picture, which is half of the rhombus, so its area is 27 then, it has a base of "2b", and an altitude of whatever the value of "x" at the intersection happens to be.
so hmmm let's check what's "x" anyway.
![\bf \begin{cases} y=x^2-b\\ y=-x^2+b \end{cases}\implies x^2-b=-x^2+b\implies 2x^2=2b \\\\\\ x^2=\cfrac{2b}{2}\implies x^2=b\implies \boxed{x=\pm\sqrt{b}}\\\\ -------------------------------\\\\](https://tex.z-dn.net/?f=%5Cbf%20%5Cbegin%7Bcases%7D%0Ay%3Dx%5E2-b%5C%5C%0Ay%3D-x%5E2%2Bb%0A%5Cend%7Bcases%7D%5Cimplies%20x%5E2-b%3D-x%5E2%2Bb%5Cimplies%202x%5E2%3D2b%0A%5C%5C%5C%5C%5C%5C%0Ax%5E2%3D%5Ccfrac%7B2b%7D%7B2%7D%5Cimplies%20x%5E2%3Db%5Cimplies%20%5Cboxed%7Bx%3D%5Cpm%5Csqrt%7Bb%7D%7D%5C%5C%5C%5C%0A-------------------------------%5C%5C%5C%5C)
19,21,23,25 easy hope this help you good luck in time