Algebra Answers

. Pat and Kim bought the same item. Pat said he paid 20% less than the list price. Kim said that if she paid 25% more for the item, she would have paid the list price. Who paid the least? 

(a)  Given the formula:-

Moles  = Concentration(Moldm^-3) X Volume(dm³)

Use the formula to find the number of moles in

2.5 X 10 ^-6 dm³ of a 8.0 X 10 ^-6 moldm^-3 solution of potassium   permanganate.

(b)           Evaluate showing your working out without calculator use:-     

           2.6x10⁷ x 3x10^-4      

                1.3 x 10³

Two points (p,q) on a linear supply equation are (3.5,116000) and (5,180000)

Determine supply function.

The production cost, represented by the y, of a Bluetooth device, is equal to the product of labour cost (m) and number of devices (x) in addition to a constant equipment renting fee (q)

Write an equation to represent the production cost in terms of m, x and q

Use the formula to find the number of moles in

2.5 X 10 ^-6 dm³ of a 8.0 X 10 ^-6 moldm^-3 solution of potassium   permanganate.

(a)           Evaluate showing your working out without calculator use:-     

           2.6x10⁷ x 3x10^-4      

                        1.3 x 10³               

An element with mass 780 grams decays by 17.1% per minute. How much of the element is remaining after 19 minutes, to the nearest 10th of a gram?

Solve for x: 7³ square root of 2x + 5

Solve for x: 4+(x-1)^1/3=2

Solve 2- square root of x+1= -5

Solve (x+6)^1/2= -x