The shape shown is a right-angled triangle together with two quarter-circles of radius r сm.
a Find the formulae for the area A and the perimeter
P of the shape.
b Find the area and perimeter when r = 3 cm.
c Find r when A = 12 cm?.​

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text