Answer:
Hi,
a=b+3
Step-by-step explanation:


Thus:
c+2b+8-4a=c-a-b-1
3b-3a=-9
<u>a=b+3</u>
Answer:
42 square yards
Step-by-step explanation:
T.S.A of cube

where l = 7yd

thus, the surface area of cube is 42 square yards
<span> 9-4x=57
-4x = 57 - 9
-4x = 48
x = -12</span>
Answer:
a. Mean = £27928.57
b. Mean without Deva's income = £19416.67
Step-by-step explanation:
The mean is calculated by dividing the sum of values by number of values. Given 7 values will be used to calculate mean.
So,
Number of values = n = 7
Now,

Rounding off to two decimal places
Mean income = £27928.57
Now we have to calculate mean without Deva's income so the number of values will be 6 and the sum will be:

The mean without Deva's income is:

Rounding off to 2 DP
Mean = £19416.67
Hence,
a. Mean = £27928.57
b. Mean without Deva's income = £19416.67
2z+6+15-9z
-7z+21
Hope this helps