Top answers

Solve x^2+8x-5=0 using completing the square

by completing the square we write the equation as (x+b/2)^2-b/2^2+c, in this case b=8 (the coefficient of x) and c=5 so we have (x+4)^2-16-5=0, which equals (x+4)^2-21=0. Now by rearranging we get (x+4)^2=21...
LH
3058 Views

In terms of structure and bonding, explain why graphite is able to conduct electricity.

Carbon is in group 4 of the periodic table therefore has 4 electrons in its outer shell which are available for bonding. Each carbon atom in graphite forms 3 covalent bonds with another carbon atom within th...
HK
10933 Views

List the structures of the nephron in kidneys and which parts of the nephron differ in permeability to water?

The bowman's capsule, Proximal convoluted tuble, loop of Henle (descending and ascending lims), distal convolued tubule and the collecting duct. The descending limb is permeable to water. The ascending limb ...
TI
Answered by Tahmid I. • Biology tutor
5005 Views

Tu amigo argentino, Pedro, te ha preguntado sobre lo que haces con tus amigos. Menciona: deportes, redes sociales, televisión, centro comercial.

Hola Pedro, ¡Cuánto tiempo! Pues, cuando estoy con mis amigos hacemos un montón de cosas, como jugar al deporte o salir a los centros comerciales. Pero en los días en los que no nos podemos ver, solemos habl...
JP
Answered by Jordan P. • Spanish tutor
2838 Views

What is opportunity cost?

Opportunity cost is something that we think about everyday but we don't always use that word. It is defined as the benefits lost from the next best alternative choice.This sounds wordy, but in an example it ...
EA
Answered by Emily A. • Economics tutor
2551 Views