The price of a computer was decreased by 10% to £504. What was the price before the decrease

Step-by-step explanation:

100-10  :  100

90    : 100

504  : x

x=540x100/90

x=50400/90

x=560

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer