Answer:
sandwiches is £1.8
bottle water = £1.2
Step-by-step explanation:
Given data
let cheese sandwiches be x
and bottle water be y
3x+2y= 7.8------------1
5x+4y= 14.20---------2
solve 1 and 2
3x+2y= 7.8------------1*5
5x+4y= 14.20---------2*3
15x+10y= 39
- 15x+12y= 42.6
-2y = -3.6
y= 3.6/2
x=1.8
Put x= 1.8 in 1
3(1.8)+2y= 7.8
5.4+2y= 7.8
2y= 7.8-5.4
2y=2.4
y= 2.4/2
y= 1/2
Hence cheese sandwiches is £1.8
bottle water = £1.2
Step-by-step explanation:
Actually, it tells you exactly what to do.
First, translate, i.e., move over, the coordinates up by 3:
Then reflect this point about the x-axis and to do this,
7.1, 7.2 ,7.3 ,7.4 ,6.5 ,6.6 ,6.7 ,6.8 ,6.9
Answer:
39 minutes (rounded to nearest minute from 39.2699)
Step-by-step explanation:
π(50)^2*30= 235619.449/6000=39.2699
round to nearest minute: 39 minutes
