3a + a - 15 = 225 . your substituting b(a-15) into the first equation. <span />
Answer:
£0.50
Step-by-step explanation:
t = one cup of tea
c = one piece of cake
t + c = £1.10
2t + c = £1.70
the cost increases by £0.60 (£1.70 - £1.10) when you order one more cup of tea which means that one cup of tea costs £0.60
substitute £0.60 into t + c = £1.10
£0.60 + c = £1.10
rearrange to get c = £1.10 - £0.60 = £0.50
so one piece of cake costs £0.50
Answer:
9(x)-20(y)
Step-by-step explanation:
a regular polygon has 6 wall then it matters that the 54 walls
Answer:
12 cm L=6cm W= 2 A=L*W 6*2=12cm
Step-by-step explanation: