-3x + 3y = -9
-3x + y = 7
Answer:
x = 5
y = 2
Step-by-step explanation:
-3x + 3y = -9
3y = 3x - 9
Equation 1. y = x - 3
-3x + y = 7
Equation 2. y = 3x + 7
So, put number 1 equation to number 2's y :
x - 3 = 3x + 7
x -3x = 7 + 3
-2x = 10
2x = 10
x = 10/2
x = 5
And, put x, which is 5 , to the any equation to figure out the y.
This time, I'll use equation number 1.
y = 5 - 3
y = 2
Here's the equation for the area of a semicircle: A = (πr²)/2
Based on this, let's solve for this area in terms of π (pi):
A = π(10²)/2 = 100π/2 = 50π
The area of the semicircle, I believe, is 50π. Hope this helps, let me know if I messed up!
Answer: A=157
Step-by-step explanation: The area of a semi-circle can be found using the radius in the formula A=1/2r^2. We substitute the radius in the equation A=1/2*3.14*10^2
First we do the exponents following pemdas.
A=1/2*3.14*10^2
A=1/2*3.14*100
Then we multiply.
A=1/2*3.14*100
A=1.57*100
A=157
The final answer is 157.
Hope this helps!
Each column in the place value system represents a value 10 times more than the column to its right. So, 1 column in the hundredths grid represents a group of 10 hundredths, which is equal to 1 tenth. Therefore, one column in the hundredths grid has a combined value that is equal to one column in the tenths grid.
In the place value system, each column represents a value that is 10 times more than the column to its right. So, 1 column in the tenths grid represents 10 times more than 1 column in the hundredths grid. Therefore, when we speak of 1 column in the hundredths grid, it's like talking about a group of 10 hundredths, which is mathematically equal to 1 tenth.
For example, if we have ten hundredths (0.01 x 10), this is equivalent to one-tenth (0.1). So, one column in the hundredths grid has a combined value that is equal to one column in the tenths grid.
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