X is a varible it equals 1 or is used in the expression
Answer: {y | −5 ≤ y ≤ −1}
Step-by-step explanation:
The extreme values are -5 and -1.
- There is a closed circle at (-2, -5), so -5 is in the range.
- There is a closed circle at (2, -1), so -1 is in the range.
So, the answer is {y | −5 ≤ y ≤ −1}.
Answer:
x=3 and 1/2
Step-by-step explanation:
4x+7y=-14
8x+5y=8
2(4x+7y=-14)
8x+14y=-28
8x+5y=8
9y=-36
y=-4
8x+5(-4)=8
8x-20=8
8x=28
x=3 and 1/2
Answer: The length of BC ≈ 12.4 cm
Step-by-step explanation:
The first thing we need to do is to find the length of BD which we can solve for with the tangent of 20° which is the opposite side over the adjacent side.
We get tan20° = BD/8.
Solve for BD and you get BD = 8tan20°.
Now we will need to solve for the length of CD which we can get from the tangent of 40°.
We get tan40° = 8/CD
Solve for CD and you get CD = 8/tan40°.
Now that we have the lengths of BD and DC, we can simply add them together to get the length of BC.
(8tan20°) + (8/tan40°) ≈ 12.4 cm
The answer is 12.5 because if you add them all together you get 200 and 25 of 200% is 12.5.
