Top answers

Line A is parallel to the line 4y+12x=24. Find the equation of Line A if it passes through the point (5,40/3).

Line A and line 4y+12x+24 are parallel. This means that they have the same gradient. In y=mx+c the gradient of the line is m. We can rearrange the equation 4y+12x+24 to find m. To begin with subtract 12x fro...
CB
Answered by Chloe B. • Maths tutor
3663 Views

Solve the simultaneous equations 3x + 2y = -7 and x=4y+21

Substitute in the second equation into the first to eliminate x from the first equation. Solve for y which should, when solved (shown below), equal -5. Sub -5 back into either equation in the place of y to t...
JG
Answered by Jamie G. • Maths tutor
4115 Views

Why does iodine have a higher boiling point than chlorine?

Iodine is a larger molecule, with more electrons, than chlorine. Therefore Iodine has stronger intermolecular forces than chlorine, which require more energy to break. This results in Iodine having a higher ...
BW
Answered by Ben W. • Chemistry tutor
36358 Views

Describe the key features of an exchange surface

exchange surfaces require a small diffusion distance enabling the fast exchange of compounds, good blood supply to maintain a concentration gradient. This allows for the most efficient diffusion
ZS
Answered by Zoe S. • Biology tutor
3686 Views

Explain covalent bonding and give an example of a simple covalent molecule.

A covalent bond is a shared pair of electrons between 2 atoms.An example of a simple covalent molecule is CH 4 (methane)
ZS
Answered by Zoe S. • Chemistry tutor
3409 Views