Answer:
72 m^2
Step-by-step explanation:
We can use ratios to find the real dimensions
5 cm 10 cm
---------- = -----------
6 m x meter
Using cross products
5x = 60
Divide by 5
5x/5 =60/5
x = 12 meters
5 cm 5 cm
---------- = -----------
6 m x meter
5x =30
Divide each side by 5
5x/5 = 30/5
x = 6m
The dimensions are 12 m by 6 m
The area is
A = l*w
=12 *6
= 72 m^2
Remark
There is a very quick way to do this. Scan the numbers. You want 75 to be the mean, so make it so. Then figure out how many up or down you go from 75. I'll make a list of the givens.
72 - 3 72 is three down from 75 so call it - 3
75 0 That is your desired average so it adds nothing to the score.
74 -1 It is one down from 75, so call it -1
76 +1 It is one up from 75
76 +1 it is one up from 75
75 adds 0.
-3 - 1 + 1 + 1 = - 2
That comes - 2/7 which means that you need a score just under 75. So 75 will give you the right average of 75
Answer B <<<<<
Answer:
518
Step-by-step explanation:
P = 2
Q = 8
p3 + 64q
Multiply "p" (which is 2) with 3
Multiply "q" (which is 8) with 8
Add the two numbers you get
And you have you answer
I hope this helps. :)