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Juliette [100K]
3 years ago
14

The vertex of this parabola is at (-2, -3). When the x-value is -1, the

Mathematics
1 answer:
valina [46]3 years ago
7 0

Answer:

-2

Step-by-step explanation:

Start with the vertex form of the equation of a parabola:  y - k = a(x - h)^2

Here h = -2, k = -3, x = -1, y = -5.  Find a:

-5 - [-3] = a(-1 - [-2])^2, or

-5 + 3 = a(1)^2, or

-2 = a

The unknown coefficient is -2.

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Calculate the area of the given quadrilaterals.​
nadya68 [22]

Answer:

dissect the trapezium into a square and triangle. since the triangle is a right angled one the base is 17-7=10cm

the height is found using Pythagorean theorem to be 24cm i.e 26²=x²+10²,x=√(676-100),x=√576,x=24cn

area of trapezium is (1/2)(a+b)h

a is the shorter side and b the longer side

(1/2)*(7+17)24

=288cm²

3 0
3 years ago
fran reads 54 pages per hour. if she reads a total of 257 pages one weekend , how many hours to the nearest hundredth does she r
natka813 [3]
You basically just have to do . . .

257/54
4.759 . . .
≈ 4.76 hours

Answer: 4.76 hours
4 0
3 years ago
Read 2 more answers
I need help with this<br>​
Mashutka [201]

Answer: D

Step-by-step explanation:

<u><em>When a coordinate is reflected over the y-axis, it changes from (x, y) to (-x, y)</em></u>

<em>The three coordinates of ΔCDE are</em>

  • C = (-8, -1)
  • D = (-6, -5)
  • E = (-2, -4)

<em>After the y-axis reflection, they'll become:</em>

  • C' = (-(-8), -1) = (8, -1)
  • D' = (-(-6), -5) = (6, -5)
  • E' = (-(-2), -4) = (2, -4)

<em>I hope this is correct :\</em>

3 0
3 years ago
Pls help thanks alot​
Levart [38]
1st, 4th, 5th. hope this helped!
8 0
3 years ago
Read 2 more answers
What is the domain of the function represented by the following graph?
Svetllana [295]

Hello!

The domain of the function are the x-values that make the function true.

Since the graph has open circles and filled in circles, the open circles make the function false (written as <) , and the filled in circles make it true (written as ≤).

From the graph, the x value -3, and 2 are open circles. While the value -0.5 are filled in circles. Also, from the interval (-0.5, 2), there is gap, so it is part of the domain.

Therefore, the domain of the function is: {x | -3 < x ≤ -0.5} ∪ {x | 2 < x < ∞}, which is the third choice.

6 0
3 years ago
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