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The line l1 has equation 4y - 3x = 10. Line l2 passes through points (5, -1) and (-1, 8). Determine whether the lines l1 and l2 are parallel, perpendicular or neither.

To determine the answer the gradient of both lines must be found. To find the gradient of line l1 the equation can be rewritten in the form y = mx + c. 4y - 3x = 10 so y = 3/4 x + 5/2. From this equation the...
RM
Answered by Rosie M. • Maths tutor
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How may nitrate from fertiliser entering lakes cause the death of fish in fresh water?

The addition of excess nitrate to the freshwater body causes algal bloom on the surface, blocking sunlight. This reduces the photosynthetic activity of submerged plants, causing them to die. Subsequently, th...
CM
Answered by Cocoa M. • Biology tutor
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‘The most important reason why Adenauer was able to remain in power for so long was the economic miracle.’ How far do you agree?

Konrad Adenauer was chancellor from September 1949 to October 1963 a rule of 14 years longer than the whole of the Weimar republic or Adolf Hitler. Compared to Weimar’s 13 chancellors and Hitler’s use of for...
DL
Answered by Daniel L. • History tutor
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"Stanley represents the macho forward-driving America of the future" - Explore this view of 'A Streetcar Named Desire'

As a protagonist, Stanley certainly represents the machismo and capitalist drive which characterised Tennessee Williams’ post-war America, informed by social tensions arising out of the upheaval of World War...
DN
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Explain the structure of an amino acid and how a peptide bond forms between two amino acids.

An amino acid is made up of four groups bonded to a central carbon atom. These groups include a hydrogen atom, a carboxyl group, an amine group and a R group. The R group differs for each amino acid. A pepti...
HT
Answered by Hazal T. • Biology tutor
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