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Answer:
P = (21.4a+36.6) cm
Step-by-step explanation:
Given that,
The width of a rectangle, b = (6.9a+8.5) cm
The length of a rectangle, l = (3.8a+9.8) cm
We need to find the perimeter of the rectangle. Perimeter is the sum of all sides. So,
P = 2(l+b)
Put all the values,
P = 2(6.9a+8.5+3.8a+9.8)
= 2(6.9a+3.8a+8.5+9.8)
= 2(10.7
a+18.3)
= (21.4a+36.6)
So, the perimeter of the rectangle is (21.4a+36.6) cm.
Answer:
11/30
Probability fractions.
On a coin we flip heads = 1/2 we can change to equal 10/20.
10/20 + 1/20 + 1/20 = 22/60 = 1+2 unit = 2 value on a 20 side.
We can then reduce.
10/20 + 1/20 +1/20 = 22/60 = 11/30
As decimal we can see this is 0.36
Which means 0.36/1
Step3 is wrong
7(3)+8-24 instead