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Solve 9x +1> 2x +3

9x - 2x> 3-17x > 2x > 2/7

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You are told that y is proportional to x^2 and that y=75, x=5. Find a formula for y in terms of x.

You know that y is proportional to x², so let y=kx² . You also know that y=75 and x=5. Substitute y=75 and x=5 into the equation y=kx² . Therefore: 75=k multiplied by 5

Answered by Anna G. • Maths tutor

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In order to solve this, we need to bring all of the x values to one side, we can do this by subtracting the 2x from both sides7x + 6 - 2x > 1 + 2x - 2x5x + 6 > 1 We then need to move the values onto...

Answered by Mala P. • Maths tutor

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Simplify (48)^(1/2)

Simplify 48^1/2:48^1/2=(124)^1/2=(434)^1/2=(4)^1/2(4)^1/2(3)^1/2=22*(3)^1/2=4(3)^1/2

Answered by Alex N. • Maths tutor

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What are the products when an acid reacts with a metal?

An acid and metal react to form hydrogen and a salt.
For example:
Mg + 2HCl ----> MgCl2 + H2
1 mole of magnesium reacts with 2 moles of hydrochloric acid to form 1 mole of magnesium chl...

Answered by Kate F. • Maths tutor

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