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Solve the following equation; 8x-2 > 4x +6

First of all we need to get all of the x's on one side and all the numbers on the other side. Therefore to do this firstly we should add 2 to both sides. 8x > 4x +8 Secondly we need to -4x from both sides...
RD
Answered by Rory D. • Maths tutor
5552 Views

What is 25% of 400?

25% = 0.25 or also one fourth of the total. Therefore if you divide 400 by 4, this equals 100. One fourth of 400 is 100.
MM
Answered by Michelle M. • Maths tutor
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In what conditions does sodium chloride conduct electricity and why?

Electricity can be defined as a flow or motion of electric charge. If a substance can allow such flow it is said to conduct electricity. Sodium chloride is made of positively charged sodium ions and negative...
PT
Answered by Piotr T. • Chemistry tutor
51967 Views

What is the difference between structural isomers and stereoisomers?

Structural isomers are compounds which have the the same molecular formula but the atoms are arranged in a different order. This can be due to a change in the carbon skeleton, the type of functional group or...
PS
Answered by Parul S. • Chemistry tutor
8308 Views

For a curve of gradient dy/dx = (2/(x^2))-x/4, determine a) d^2y/dx^2 b) the stationary point where y=5/2 c) whether this is a maximum or minmum point and d) the equation of the curve

a) Differentiating gives d 2 y/dx 2 =-4x -3 -1/4 b) Let dy/dx=0 and rearrange to find x=2 c) Inserting x=2 into d 2 y/dx 2 =-4x -3 -1/4 will show that d 2 y/dx 2 is smaller than zero so this is a maximum sta...
KM
Answered by Katie M. • Maths tutor
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