I don't understand it
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The area of the shaded region can be found by subtracting the area of the triangle from the area of the semicircle.
To find the area of the shaded region, we need to calculate the area of the semicircle and subtract the area of the triangle from it. First, let's find the area of the semicircle. The formula to find the area of a semicircle is A = (π * ) / 2, where π is approximately 3.14 and r is the radius. Plugging in the values, we have A = (3.14 * ) / 2 = 127.26 square cm.
Next, let's find the area of the triangle. The formula to find the area of a triangle is A = (base * height) / 2. In this case, the base of the triangle is the diameter of the semicircle, which is 2 * 9 = 18 cm. The height of the triangle is the radius of the semicircle, which is 9 cm. Plugging in the values, we have A = (18 * 9) / 2 = 81 square cm.
Finally, to find the area of the shaded region, we subtract the area of the triangle from the area of the semicircle: 127.26 - 81 = 46.26 square cm. So, the area of the shaded region is 46.26 square cm.
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Answer:
Step-by-step explanation:
The even number of minus signs means the product will be positive. A factor of 3 can be removed to simplify the product. As usual, the numerator of the product is the product of numerators, and the denominator of the product is the product of denominators.
The answer to the expression is 0.
In this expression, we have two terms that are identical: .
When we multiply a negative number by another negative number, the result is positive.
So, both of these terms become positive, and since they are identical, when we subtract one from the other, we get zero.
Now, let's provide a more detailed explanation.
When we multiply , we first multiply the numerators to get 9 and the denominators to get 42.
So, .
Now, we can simplify by dividing both the numerator and denominator by their greatest common divisor, which is 3.
So, simplifies to .
Therefore, the expression becomes , and when we subtract these two identical fractions, the result is indeed 0.
for such more questions on expression
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Answer: The number $1 bills is 8 and the number of $5 bills is 8.
Step-by-step explanation:
Let x denotes $1 bills and y be denotes $5 bills.
Then , we have the following equations :-
Subtracting equation (1) from (2), we get
Substitute y=5 in equation(1), we get
Hence, the number $1 bills is 8 and the number of $5 bills is 8.