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The cost of renting a car for a day is given by the linear funtion c(x)= 0.13x+31, where c(x) is in dollars and x is the number of miles driven.Find the cost of driving the car 200 miles.

put in term s of x-200:

$c(x)=0.13\times200+31=57$

Hi Katie-Leigh !

$x+y=48\\ x-y=24$

Solve that and you will get the answer

Sophia wants to cover her garden with grass seed to make a lawn. Each bag is enough to cover 20m^2 of garden. Each bag costs £9.99. Calculate the lowest possible cost of putting grass seeds in Sophia's garden.

let s say Sophias garden is  x  m long and y m wide:

$\frac{x\times y}{20}\times 9.99 £$

aa ok i understand :)

wait but it is saying "do not include a pink card next to a green card" only pink card next to green

$A_{triangle}=\frac12bh \\ \text{where your :}\\ b=15 \\ h=19 \\ A_{triangle}=\frac{15\times19}{2}=142.5$