Step-by-step explanation:
Will u give me brainliest
Step-by-step explanation:
2x + 3y = 18
x - y = -1
therefore
x = y - 1
we use this identity in the first equation :
2(y - 1) + 3y = 18
2y - 2 + 3y = 18
5y - 2 = 18
5y = 20
y = 20/5 = 4
x = y - 1 = 4 - 1 = 3
The difference in area between the large and small cakes is 128π square inches.
Suppose the circle has radius of 'r' units, then, its area is given as:
sq. units
Since radius of a circle is half of its diameter, so if diameter is of 'd' length, then r= d/2, thus, area can be rewritten as:
We are given that;
A bakery offers a small circular cake with a diameter =8 inches
A large circular cake with a diameter = 24 inches
Now,
For the small cake, the diameter is 8 inches, so the area is A = (π/4) × 8^2 = 16π square inches.
For the large cake, the diameter is 24 inches, so the area is A = (π/4) × 24^2 = 144π square inches.
To compare the areas, you can divide them by each other:
(144π)/(16π) = 9
This means that the large cake has 9 times the area of the small cake, not 3 times. The difference is because when you increase the diameter by a factor of 3, you increase the radius by a factor of 3 as well, and then you square it in the formula. So the area increases by a factor of 3^2 = 9.
144π - 16π = 128π square inches.
Therefore, by the area of a circle the answer will be 128π square inches.
Learn more about area of a circle here:
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Answer:
5
Step-by-step explanation:
replaxe x with 8
simplify using PEMDAS(parenthesis, exponents, multiplication/division, addition/subtraction)