Sophie is making 400 scones she uses butter, sugar and flour in the ratio 2:1:9 here are the costs of those ingredients.
the total mass of the butter, sugar and flour in each in scone is 30g
work out the total cost of these ingredients for the 400 scones

Butter £2.20 per 500g
Sugar £1.60 per kilogram
Flour 60p per 1.5kg​

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

a mantle plume is an upwelling of abnormally hot rock within the earth's mantle. as the heads of mantle plumes can partly melt when they reach shallow depths, they are thought to be the cause of volcanic centers known as hotspots and probably also to have caused flood basalts.

step-by-step explanation:

step-by-step explanation: