Please help
a store is having a sale on chocolate chips and walnuts. for 3 pounds of chocolate chips and 2 pounds of walnuts, the total cost is $15. for 8 pounds of chocolate chips and 4 pounds of walnuts the cost is $37. find the cost for each pound of chocolate chips and each pound of walnuts

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?