By comparing the perimeters, we can deduce the scaling factor:
The areas scale with the square of the scaling factor, so the new area is
Absolute value 5+7-12
1 answer:
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Let us suppose that 'm' cookies and 'n' brownies were baked.
Since, Helen baked 31 items in total.
So, m+n = 31 (Equaion 1)
So, m = 31-n
Now, since cookies are sold for 95 cents, and the brownies sold for 60 cents.
Since, 1 $ = 100 cents
So, cookies are sold for $0.95, and the brownies sold for $0.60.
Helen sold the cookies and brownies at $23.85
So, 0.95m + 0.60n = 23.85 (Equaion 2)
Substituting the value of 'm' in equation 2, we get as
29.45 - 0.95n +0.60n = 23.85
-0.35n = -5.6
So, n = 16
Since, m = 31-n
m = 31-16
m = 15
So, Helen sold 15 cookies and 16 brownies.