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2 years ago

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Mathematics

1 answer:

IgorC [24]2 years ago

8 0

Step-by-step explanation:

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Write the expression below in simplest form. 3x^2 + 8x -1+2(x^2 +5x+3) (work shown please!)

Alinara [238K]

Answer:

5x^2+18x+5

Step-by-step explanation:

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2 years ago

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What is the solution to the system of equations below?

Andre45 [30]

Answer:

Please check the explanation.

Step-by-step explanation:

Given the equations

$y=-6x-10$

$y=-3x-21$

solving the system of the equations

Arrange the equation variables for elimination

$\begin{bmatrix}y+6x=-10\\ y+3x=-21\end{bmatrix}$

$y+3x=-21$

$-$

$\underline{y+6x=-10}$

$-3x=-11$

$\begin{bmatrix}y+6x=-10\\ -3x=-11\end{bmatrix}$

solve

$-3x=-11$

Divide both sides by -3

$\frac{-3x}{-3}=\frac{-11}{-3}$

$x=\frac{11}{3}$

$\mathrm{For\:}y+6x=-10\mathrm{\:plug\:in\:}x=\frac{11}{3}$

$y+6\cdot \frac{11}{3}=-10$

$y=-32$

Therefore, the solutions to the system of the equations are:

$y=-32,\:x=\frac{11}{3}$

But, it seems none of the options is true.

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2 years ago

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I need help with this problem

kiruha [24]

A. The water will go down 2 inches
B. The water will go down 4.5 inches
C Half of the question is missing.

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3 years ago

Which equation describes the line that passes through the points (-4, 19) and (2, -1)

dangina [55]

Answer:

y=-5/2x+4

Step-by-step explanation:

find the slope by using y2-y1/x2-x1

-1-19/2-(-4)

simplify

-20/8

simplify

-5/2

use slope-intercept form, y=mx+b

since we know the slope, find b

plug in one of the ordered pairs into the equation

-1=(-5/2)(2)+b

simplify

-1= -10/2+b

simplify

-1=-5+b

add 5 to both sides

b=4

plug b into y=-5/2x+b

y=-5/2x+4

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2 years ago

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Given ABC = DEF, m DE = 5x - 4. Find the value of x.?

lesantik [10]

There something you ain’t giving us in this equation

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2 years ago