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Solve 5(x-6) < 20

When we solve this, it's going to be the same process as solving 5(x-6) = 20, except at each step we need to think about whether we change the inequality round or keep it the same. There are two ways of doin...
JS
Answered by Joseph S. • Maths tutor
5504 Views

Given y = 2x(x2 – 1)5, show that (a) dy/dx = g(x)(x2 – 1)4 where g(x) is a function to be determined. (b) Hence find the set of values of x for which dy/dx > 0

Given y = 2 x ( x 2 – 1) 5 , show that (a) d y/dx = g( x )( x 2 – 1) 4 where g( x ) is a function to be determined. dy/dx= (2)( x 2 – 1) 5 + (2x)*5(x 2 – 1) 4 (2x) dy/dx= ( x 2 – 1) 4 ( 2( x 2 – 1) + 20x 2 )...
AI
Answered by Abi I. • Maths tutor
10992 Views

√5(√8 + √18) can be written in the form a√10 where a is an integer. Find the value of a.

√40 + √90 = (√10 x √4 ) + (√10 x √9 ) = 2√10 + 3√10=5√10
AI
Answered by Abi I. • Maths tutor
5471 Views

Solve 5(x + 3) < 60

5(x + 3) &lt; 60Multiple the number outside of the bracket with the contents of the bracket:5x + 15 &lt;60 Next, bring all the numbers to one side 5x &lt;60-15Now simplify 5x &lt; 45Simply further x &lt; 45/...
PJ
Answered by Priyancaa J. • Maths tutor
4122 Views

What is a vector and how do I calculate the 'modulus' of a vector?

A vector is something that has both magnitude and direction . An example of a vector is velocity because it has magnitude and direction. However, speed is not a vector. This is because it only has magnitude....
AS
Answered by Anya S. • Maths tutor
19479 Views