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lara31 [8.8K]
1 year ago
6

Expand and simplify -2(x + 4x^2) + 3(x^2 + 2x)

Mathematics
1 answer:
Vlad1618 [11]1 year ago
5 0

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horrorfan [7]

the other 2 coordinates are option C

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2 years ago
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Write and equati9n of a l8ne that passes through (1,-2) and is perpendicular to -4x+7y=21
yarga [219]

Given:

A line passes through (1,-2) and is perpendicular to -4x+7y=21.

To find:

The equation of that line.

Solution:

We have, equation of perpendicular line.

-4x+7y=21

Slope of this line is

m_1=-\dfrac{\text{Coefficient of x}}{\text{Coefficient of y}}

m_1=-\dfrac{-4}{7}

m_1=\dfrac{4}{7}

Product of slope of two perpendicular lines is -1.

m_1\times m_2=-1

\dfrac{4}{7}\times m_2=-1

m_2=-\dfrac{7}{4}

Now, slope of required line is -\dfrac{7}{4} and it passes through (1,-2). So, the equation of line is

y-y_1=m(x-x_1)

where, m is slope.

y-(-2)=-\dfrac{7}{4}(x-1)

4(y+2)=-7(x-1)

4y+8=-7x+7

4y+7x=7-8

7x+4y=-1

Therefore, the equation of required line is 7x+4y=-1.

7 0
2 years ago
7w-180=52w what does w equal
BartSMP [9]

Answer: w= -4

Step-by-step explanation:

7w-180=52w

Subtract 7w on both sides.

-180=45w

Divide both sides by 45.

-4=w

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3 years ago
Solve for x: 13x + 12] = 18
Mekhanik [1.2K]

Answer = x= 0

Step-by-step explanation:

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Which equation shows the quadratic formula used correctly to solve 5x^2+3x-4=0 for x?
zhuklara [117]

Answer:

-3±√89/10

Step-by-step explanation:

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