Answer:
Step-by-step explanation:
l = length
b = breadth
We know the length is twice the breadth, therefore l = 2b
We also know that the perimeter p = 60m and can also be expressed as a sum of its sides where p = l + l + b + b = 60 which simplified is:
60 = 2l + 2b
Now we have 2 variables, but thankfully we were given a ratio (l = 2b) relating the two. Substituting 2b in for l gives us:
60 = 2(2b) + 2b = 4b + 2b = 6b
60 = 6b
b = 10 m
Now that we know the breadth we can find the length:
l = 2b → l = 2(10) = 20 → l = 20 m
With a breadth of 10 m and a length of 20 m
19/2 = 9.5
(9.5)^2 = 90.25 = 9 + 81.25
x^2 - 19x + 9 = 0
x^2 - 19x + 90.25 - 81.25 = 0
(x - 9.5)^2 = 81.25
x - 9.5 = +/-sr(81.25)
I will let you finish from here
PEMDAS<span> is a word for Parenthesis Exponents Multiplication Division Addition Subtraction.</span>
I’m not sure very sorry good luck tho
Answer:
118
Step-by-step explanation:
10-4xy
10-4(9)(-3)
10-36(-3)
10+108
118
