Gre Math

Question 0

Movie theater charges £6 per ticket and costs £1,750 per movie. How many people must see a movie so that the theater makes £1 profit per person

Answer 0

C=6c–1750
-5c=-1750
C=350

Question 1

Pens cost 70 cents each. Pencils cost 40 cents each. Jakob spent £5.20. 10 pens and pencils, how many pencils did he buy?

Answer 1

Number of pencils = x
Number of pens = x-10
70(10-x) + 40x = 520
700-70x+40x=520
x=6

Question 2

Aspect ratio is width:height

16:9 and perimeter of 100. How many inches wide is the monitor?

Answer 2

Width = 16m
Height= 8m 
Perimeter of rectangle = 2(l+w)
100=2(16m+8m)
100=50m
M=2
16m= 32