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igomit [66]
2 years ago
6

Question 9 (3 points)

Mathematics
1 answer:
Lilit [14]2 years ago
7 0

Answer:

Precambrian period

Step-by-step explanation:

Since the Great oxidation period = 2.4 Billion years ago era = Precambrian period.

Micro-fossils attributed to cyanobacteria are abundant during the Proterozoic that came later 2,5 billion years ago and ended 540 million years ago,

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Three of the four vertices of a rectangle are located at (4, 2), (7, 2) and (4, 8). a. What are the coordinates of the missing v
34kurt

Answer:

a) The coordinates of the missing vertex = (7, 8)

b) Area = 18 square units

   Perimeter = 18 units

Step-by-step explanation:

a) We know three of the four vertices:

A: (4, 2)           C ______ D(?)

B: (7, 2)               |             |

C: (4, 8)           A |______| B  

To find the coordinates of the missing vertex we need to calculate the distance in the x-direction from point A to point B:

B_{x} - A_{x} = 7 - 4 = 3                    

Hence, the distance of point D from point C in the x-direction is:

D_{x} = C_{x} + 3 = 4 + 3 = 7

Now, to find the coordinate in "y" we need to calculate the distance in the y-direction between point C and point A:

C_{y} - A_{y} = 8 - 2 = 6  

Then, the distance of point D from point B in the y-direction is:

D_{y} = B_{y} + 6 = 2 + 6 = 8

Therefore, the coordinates of the missing vertex (point D) are:

D = (D_{x}, D_{y}) = (7, 8)    

b) The area of the rectangle is:

a = (B_{x} - A_{x})*(C_{y} - A_{y}) = 3*6 = 18 units^{2}

The perimeter is given by:

p = 2*(3 + 6) = 18 units

I hope it helps you!          

8 0
2 years ago
In a scalene triangle , the perimeter is 33, and the length of one side is 15, and the difference between the two other sides is
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Answer:D

Step-by-step explanation:

4 0
3 years ago
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5 0
3 years ago
Find the equation of the tangent line to the curve y=x sqrtx at point (4,8)<br><br> Y=?
Viefleur [7K]

Answer: I think y is 32 im not good at this tho

Step-by-step explanation:

7 0
3 years ago
What’s negative 9 and 2 sevenths subtracted by negative 10 and three sevenths
Nutka1998 [239]

Answer:

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Step-by-step explanation:

Convert the mixed numbers to improper fractions, then find the LCD and combine.

Glad I could help!!

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