<h2> <u>Explanation</u><u>:</u></h2>








By first equation,

























Therefore, the values of x and y are -8/9 and 112/36 respectively.
The volume of a rectangular pyramid = 1/3 ×Area×height
=1/3×L×W×H
if the dimensions were doubled
therefore,
V=1/3 × (9×2)×(14×2)×(10×2)
=1/3×18×28×20
=3360 cubic centimetres
27$ because you do 20*15*12 then 3600*0.09 and divide that answer by 12 which is 27
303-63=240 miles that she can drive