What is the value of this expression when a=7 and b= -4
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
It must end in (divisible by 2 rule) and the digits must sum to a multiple of 9(divisible by 9 rule).
The digit sum is .
We want to make as low as possible because it's a higher digit than
.
If is as low as possible, we have that the sum is
. Uh-oh.
has to be even! So
doesn't work.
If , we have that the sum is
. Yay!
So, the answer is
Answer:
Step-by-step explanation:
The pressure is equal to the atmospheric pressure 101 kN/m plus 8 kN/m for every meter below the surface, therefore;
a. expression for pressure is given by,
............................... (1)
where d = depth below the surface in meter.
b. to find the depth at any pressure, equation (1) above is rearranged to make depth (d) subject of the formula
as an example, to find depth at pressure of 200N/m
d = (200 - 101)/8 = 12.375 meters
depth is 12.375 meters below the surface.