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3 years ago

Please someone help, give the right answer it’s important

Mathematics

1 answer:

N76 [4]3 years ago

7 0

Answer:

(2)

Step-by-step explanation:

Having three of the same angles ("AAA") does not prove that two triangles are congruent. All the other options use one of the viable methods (SSS, SAS, ASA, AAS).

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∆ABC is reflected across the x-axis, then rotated 90° clockwise about the origin, and finally reflected across the line y = x to

torisob [31]

Answer:

Step-by-step explanation:

Notice that the vertices are A(1,1), B(2,3) and C(2,1).

A reflection across the x-axis give the coordinates A'(1,-1), B'(2,-3) and C'(2,-1). Then, we apply the rotation 90° clockwise about the origin A'(1,1), B'(3, 2) and C'(1, 2).

Finally, a reflection across the line y = x, gives A'(1,1), B'(2,3) and C'(2,1)

Therefore, the coordinates of the image are A'(1,1), B'(2,3) and C'(2,1).

6 0

3 years ago

What is the solution of 2x-y=9

Sedaia [141]

<span>Simplifying 2x + -1y = 9 Solving 2x + -1y = 9 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'y' to each side of the equation. 2x + -1y + y = 9 + y Combine like terms: -1y + y = 0 2x + 0 = 9 + y 2x = 9 + y Divide each side by '2'. x = 4.5 + 0.5y Simplifying x = 4.5 + 0.5y

Hope this helps :)

~I tried to space it out so it wont look like a bunch of mess scrambled up xD~</span>

7 0

4 years ago

The directrix of a parabola is y=−4y=−4 . The focus of the parabola is (−2,−2)(−2,−2) .

Dennis_Churaev [7]

Because the focus is (-2,-2) and the directrix is y = -4, the vertex is (-2,-3).

Consider an arbitrary point (x,y) on the parabola.
The square of the distance between the focus and P is
(y+2)² + (x+2)²
The square of the distance from the point to the directrix is
(y+4)²

Therefore
(y+4)² = (y+2)² + (x+2)²
y² + 8y + 16 = y² + 4y + 4 + (x+2)²
4y = (x+2)² - 12
y = (1/4)(x+2)² - 3

Answer: $y= \frac{1}{4} (x+2)^{2} - 3$

5 0

3 years ago

Find the y intercept and x intercept for the following liner equation -4x-10y=-40

Vinvika [58]

The y intercept is 4, and the x intercept is 0.

5 0

4 years ago

What is the value of the discrimination b2 - 4ac for the quadratic equation 0=x2 - 4x +5 and what does it mean about the number

ElenaW [278]

Answer:

The value is -4 but in there should be a square root sign around b^2 - 4ac and a there is no square root for a negative number so it has no real solutions

Step-by-step explanation:

So a discriminant is when you plug your quadratic equation into √b^2-4ac to find out the amount of solutions you have. The formula for a quadratic equation is ax^2 + bx + c. So in this case, the equation is x^2 - 4x + 5 so b= - 4, a=1, and c=5. We plug it in now.

√(-4)^2 - 4 x (1) x (5)

Now we simplify

√16-20

√-4

There are rules to discriminants so if it is a positive number it has 2 solutions. If it is zero it has one. And if it is negative then it has none. In this case it is negative so it has none

4 0

4 years ago