True!
all parabolas with vertical directrix DO open to the left/right.
Answer:
Step-by-step explanation:
density of oil, d = 30 lb/ft³
Volume of tank, V = l x w x h = 1 x 2 x 1 = 2 ft³
mass of oil, m = Volume x density of oil = 1 x 30 = 30 lb
Work = m x g x h = 30 x 32 x 3 = 2880 units
Step-by-step explanation:
![\text{Other solution}\\\\(x^2-y^2)^2\\\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\= [(x-y)(x+y)]^2\\\\\text{use}\ (ab)^n=a^nb^n\\\\=(x-y)^2(x+y)^2](https://tex.z-dn.net/?f=%5Ctext%7BOther%20solution%7D%5C%5C%5C%5C%28x%5E2-y%5E2%29%5E2%5C%5C%5C%5C%5Ctext%7Buse%7D%5C%20a%5E2-b%5E2%3D%28a-b%29%28a%2Bb%29%5C%5C%5C%5C%3D%20%5B%28x-y%29%28x%2By%29%5D%5E2%5C%5C%5C%5C%5Ctext%7Buse%7D%5C%20%28ab%29%5En%3Da%5Enb%5En%5C%5C%5C%5C%3D%28x-y%29%5E2%28x%2By%29%5E2)
9514 1404 393
Answer:
5, 10, 20
Step-by-step explanation:
Suppose the three numbers are x, 2x, and 4x. Then they have the required ratios. After the transformation, we have ...
((x+3) +(4x -8))/2 = 2x . . . . . 2nd term is average of 1st and 3rd
5x -5 = 4x ⇒ x = 5
The original numbers are 5, 10, 20.
_____
After the adjustment, the arithmetic sequence is 8, 10, 12.
Answer:
Construct two [intersecting, perpendicular] diameters and connect the four endpoints
