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navik [9.2K]
3 years ago
9

7. Point D is reflected across the x-axis. What are the coordinates of its image?

Mathematics
1 answer:
Talja [164]3 years ago
4 0
The answer would be (3,1)
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50 POINTS find the length of ab plz help me
Umnica [9.8K]

Answer:

about 9.4 units

Step-by-step explanation:

Distance formula:

√(x1 - x2)² + (y2 - y1)²

Coordinates:

A (4, 2)

B (9, 10)

Let's make 9 = x1

Let's make 4 = x2

Let's make 10 = y1

Let's make 2 = y2

Substitute into the distance formula:

√(x1 - x2)² + (y2 - y1)²

√(9 - 4)² + (2 - 10)²

Solve:

√(9 - 4)² + (2 - 10)²

√(5)² + (-8)²

√25 + 64

√89

≈ 9.4

Therefore, the length of AB is approximately 9.4 units.

7 0
3 years ago
Read 2 more answers
In the world of right triangles why does a (squared) + b(squared) = c(squared)? thanks konrad streuli
BlackZzzverrR [31]

Answer:

Pythagoras Theorem

Step-by-step explanation:

Like you rightly stated, in a right angled triangle. The phenomenon you mentioned is what us called Pythagoras theorem which proved to us that the square of the length of the hypotenuse of a right angled triangle, is equal to the square of the length of the opposite side to the angle in question, and also to the square of the length of the side adjacent to the same angle in question.

Essentially,

a² + b² = c², where c is the hypotenuse and a & b is the length of the two other sides

6 0
3 years ago
Use a number line to find the value of the expression -4+4-9 what property can you use to make your calculation easier explain
Bess [88]
You can put the -4 and -9 together and put it at the end to make the new sequence 4-13 which would leave you with -9
8 0
3 years ago
I need help with this problem​
Artyom0805 [142]
Lin and Lin hope this helpssssss
5 0
2 years ago
The function s(t) = vt + h - 0.5at^2 represents the height of an object, s, from the ground after the time, t, when the object i
dlinn [17]
To answer this item, we just have to substitute the given to the equation, where s is equal to 4 and v is equal to 80 ft/s. 
                                4 = (80)t - 0.5(32 ft/s²)(t²)

The value of t from the equation generated above is equal to 4.94 s. Thus, the answer is approximately 5, letter D. 
3 0
3 years ago
Read 2 more answers
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