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Simplify the following, 125^-2/3

1. The minus sign indicates that the answer is a reciprocal meaning basically 1 over. 2. Next, on inspection of the fraction, the 2 on top means that you square the number, times it by itself. 3. The 3 on th...
CB
Answered by Cameron B. • Maths tutor
3423 Views

Differentiate dy/dx ((2x^3)+(x^2)-(4x)+7)

Differentiate each term in the equation separately then put then put the differentiated equation back together.First we start with (2x 3 ):2 x 3 = 6 and 3-1=2 so we get the differentiated term of 6x 2 then w...
TR
Answered by Theodora R. • Maths tutor
3372 Views

Solve the simultaneous equations: 3x + y = 19 and x - 2y = -3

First rearrange x - 2y = -3 by adding 2y to each side to give x = -3 + 2ySubstitute this into the first eq. to give 3(-3 +2y) + y = 19Expand brackets first: -9 + 6y + y = 19Rearrange and simplify by collecti...
JM
Answered by Jessica M. • Maths tutor
5641 Views

Solve the following simultaneous equations 7x - 6y =38 and 3x + 9y =-3

To solve these equations you first want to eliminate the same variable from each equation. In this question it is easiest to eliminate Y, to do this we will times equation 1 by 3 to get 21X-18Y=114 and equat...
IR
Answered by Isabelle R. • Maths tutor
3815 Views

Write 16*8^2x as a power of 2 in terms of x.

Change 16 as a power of 2 to get 2 4 . Change 8 2x as a power of 2 gives (2 3 ) 2x . You can times the two powers together giving 2 6x .So 16*8 2x =2 4 *2 6x . Now the powers can be added since the bases are...
NA
Answered by Nabeel A. • Maths tutor
14776 Views