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solong [7]
3 years ago
12

4. Simplify the expression:

Mathematics
1 answer:
Natalija [7]3 years ago
3 0

Answer:

<h2>A. 2x² + 5x + 1</h2>

Step-by-step explanation:

7x^2-6+4x+7-5x^2+x\qquad\text{combine like terms}\\\\=(7x^2-5x^2)+(4x+x)+(-6+7)\\\\=2x^2+5x+1

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Natasha_Volkova [10]

Answer:

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Step-by-step explanation:

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What is the area of the triangle?<br>PLSSS help me
AveGali [126]

Answer:

The area of the triangle is A=6 \:units^2.

Step-by-step explanation:

The area <em>A</em> of a triangle is given by the formula A=\frac{1}{2} bh where <em>b</em> is the base and <em>h</em> is the height of the triangle.

From the graph, we can see that the base is 3 units and the height is 4 units. Therefore, the area of the triangle is

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8 0
3 years ago
Please help I’m so confused (picture has question)
kipiarov [429]

Answer:

C.

Step-by-step explanation:

all you do is go look and see which one is in the exact same spot


3 0
3 years ago
Read 2 more answers
What is the equation of the parabola with a directrix at y = 4 and focus (0, -4).
Svet_ta [14]
Given that the directrix is at y = 4 and the focus is at (0, -4), then the vertex is at (h, k) = (0, 0).
p is the distance between the vertex and the focus and between the vertex and the directrix = 4 and since the focus is below the directrix, p is negative, i.e. p = -4
Equation of a parabola is given by (x - h)^2 = 4p(y - k)
Therefore, the required equation is (x - 0)^2 = 4(-4)(y - 0)
x^2 = -16y
y = -1/16 x^2
3 0
3 years ago
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