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Use the formula 5p + 2q = t to find the value of q when p = 4 and t = 24. 6

5p+2q=t 5*4+2q=24.6 20+2q=24.6 2q=24.6-20 2q=4.6 q=4.6/2 q=2.3

Answered by • Maths tutor

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Simplify (x+4)^(2)-(x-2)^(2)

Treat the question, (x+4)²-(x-2)²as a²-b² where we can simplify as (a+b)(a-b). ie. (x+4+x-2)(x+4-x+2) *be careful about change of signsWe then get (2x+2)(6) wh...

Answered by Loreen T. • Maths tutor

3196 Views

The point P has coordinates (3, 4) The point Q has coordinates (a, b) A line perpendicular to PQ is given by the equation 3x + 2y = 7 Find an expression for b in terms of a.

3x-2y=7. y=-3/2x+7/2. mn=-1. m=2/3. m=dy/dx. 2/3=4-b/3-a. 4-b=2-2/3a.b=2/3a+2

Answered by Mayank R. • Maths tutor

2524 Views

Solve the simultaneous equations 3x + y = –4 and 3x – 4y = 6

Rearrange first equation so we can eliminate one variable: y= - 4 -3x We can then plug this into the second equation so we get rid of the y's and just have x's: 3x-4(-3x-4)=6Simplify this: 3x + 12x+16=6...

Answered by Anushka C. • Maths tutor

3317 Views

How does current travel in a parallel circuit?

The current is split at electrical junctions. The total current entering a junction is equal to the total current exiting a junction. More current passes through the path with least resistance.

Answered by Athul P. • Physics tutor

1831 Views