Answer:
-3
Step-by-step explanation:
Note the right side of the equation. There is a negative sign outside of the parenthesis. Distribute the negative sign to all terms within the parenthesis:
x + 3 = - (-x + __)
x + 3 = x - ___
Note:
1) When multiplying a negative and positive together, the answer will be negative
2) When multiplying a negative and negative together, the answer will be positive:
x + 3 = x - ___
Note the equal sign, this means that the two side of the equation must equal. This means that the only answer choice is -3:
x + 3 = x - (-3)
x + 3 = x + 3 (True)
~
Answer:
145769 ft²
Step-by-step explanation:
This involves the use of Heron's formula to find the area of the triangle, given the side lengths. We will need to find the semi-perimeter of the triangle, which is half of the full perimeter.
s = semi-perimeter
s = (650+760+450)/2
s = 1860/2
s = 930
Now, using this we put it into Heron's formula to find the area.
A = √((930)(930-650)(930-760)(930-450))
A = √(930(280)(170)(480))
A = √21248640000
A = 145769.1325
A = 145769
The area of the parcel is 145769 ft²
Let's set the population of Zimbabwe in 1950 equal to x.
So in 2003, the population was 12.6 million. So our equation should equal 12.6 million. Here's how you turn the other parts of the problem into an equation:
4x + 1m = 12.6 m
Now to solve.
4x = 12.6m - 1m
4x = 11.6m
x = 11.6m/4
x = 2.9m
In 1950, the population was 2.9 million