1a. 21/3+32/5
((2*3)+1)/3+((3*5)+2)/5
7/3+17/5
(7*5+17*3)/15
86/15
1b. 2/3+3/5+2/5
(2*5+3*3+2*3)/15
(10+9+6)/15
25/15
5/3
2a. 57/10-22/5
(5*10+7)/10-(2*5+2)/5
57/10-12/5
(57*1-2*12)/10
33/10
2b. 5/12-1/4
(5*1-1*3)/12
2/12
1/6
3 say she has x stamps,she gave 2/9 and 1/5 to her frends so she is left with
X-2x/9-x/5
(9*5x-5*2x-9*1x)/45
(45x-10x-9x)/45
26x/45
4. 7/10+1/5
(1*7+2*1)/10
9/10
5. Brick 21/3kg
Stone (2*3+1)/3-(1*10+1)/10
7/3-11/10
(7*10-3*11)/30
(70-33)/30
37/30
Answer:
Step-by-step explanation:
9:x = x :4
Product of mean = product of extremes
x *x = 9*4
x² = 36
x² = 6²
x = 6
→Amount charged by wireless service provider when 'm' messages are sent=$(30+0.10 m)
Amount charged if ' 1 ' messages are sent= $30+0.10×1=$30.10
Amount charged when '2' messages are sent=$30+0.10×2=%30.20
.....................................................
Amount charged or money you will pay when 'u' messages are sent=$30+0.10×u=$(30+0.10 u)
