Hera

This page lists questions and answers that were posted by visitors named Hera.

Questions

The following questions were asked by visitors named Hera.

A density bottle weighs 0.25N when empty, 0.75N when filled with water and 0.65N when filled with alcohol.Calculate: a.volume of the bottle b.the density of alcohol.

Find the volume of a parallelepiped with 3 edges defined by Vectore a = (-2, 1, 4), Vector b = (5, 9, 0) and Vectore c = (0, 3, -7).

Johnny is one-third old as his sister, Mary, and 8 years younger than his brother Logan. The sum of their ages is 38 years old. How old is Johnny?

Answers

The following answers were posted by visitors named Hera.

X=6(1-y/12) X=6-0.5y A=xy dA/dx=d/dx(6-0.5y)(y) dA/dx=6-y 0=6-y y=6 X=6-(0.5)(6) X=3

In the first change, how did it become ar^2 - 2ar + a -4 = 0, how was it -4? Shouldn't it be ar+2 - a = ar^2 - (ar+2) ar^2 - ar - ar - a + 2 - 2 =0 ar^2 - 2ar - a = 0?

How do we get the d value though?

how do you find Q?

I am so lost, how did you get -3 and +4? Also, the PDF is not opening for me, so I'm unable to see what you have shared.