book Maths Puzzle Numerical Ability

twenty-one minus the sum of fifteen and five
How would i write this problem out in mumerical form

Read Solution (Total 0)

book Other Question

please help me with this problem. graph x^2 over 16 minus y^2 over 25=1.. (x^2,y^2 are x and y squared) show how you arrived at your graph by determining the (a)x-intercepts, (b)e Can you help me please?
If the cost equation for a product is give by C=2x^2+32, find the marginal cost. How would I find this?