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Anastasy [175]
3 years ago
13

Simplify the expression below. (2y+1)^2-4y^2+2 A. 4y+3 B. 2y+3 D. -1

Mathematics
1 answer:
kramer3 years ago
5 0

Answer:

4 y + 3

Step-by-step explanation:

y = -3/4

d/dy((2 y + 1)^2 - 4 y^2 + 2) = 4

Indefinite integral:

integral(2 - 4 y^2 + (1 + 2 y)^2) dy = 2 y^2 + 3 y + constant

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If I assume that p is supposed to be r, then:

r = 12.5

or

r = 25/2 is improper or 12 & 1/2 is proper

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Janelle subtracts -4 from a number. The result is 2. What is the number
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What is the area of the largest rectangle with lower base on the x-axis and upper vertices on the curve y = 12 - x2? (4 points)
wolverine [178]

Answer: 16 square units

Step-by-step explanation:

let the vertex in quadrant I be (x,y)  

then the vertex in quadratnt II is (-x,y)  

base of the rectangle = 2x  

height of the rectangle = y  

Area = xy  

= x(12 - x²)  

= -x³ + 12x  

d(area)/dx = 3x² - 12 = 0 for a maximum of area  

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x² = 4  

x = ±2  

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7 0
3 years ago
Find the y intercept of (-2,5) and (3,25)
Alex777 [14]

Answer:

The y-intercept is (0, 13).

Step-by-step explanation:

First finf the equation of the line:

The slope = (25- 5) / (3 - -2)

= 20/5

= 4

So its equation is

y - 5  = 4(x  + 2)

y = 4x + 13

The y-intercept occurs when x = 0

so y-intercept = 4(0) + 13.

It's (0, 13).

7 0
4 years ago
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