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3 years ago

Twice the sum of a number and five is negative two.

Mathematics

1 answer:

Genrish500 [490]3 years ago

8 0

Answer:

2(x+5) =-2

2x + 10 = -2

-10. -10

2x = -12

x = -6

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Expand the polynomial and simplify: (4xy− 1 8 y^2)^2

Vinvika [58]

Answer: $4y^{2}(2x-9y)^{2}$

Step-by-step explanation:

We have the following polynomial:

$(4xy-18y^{2})^{2}$

This is a polynomial of the form $(a-b)^{2}=a^{2}-2ab+b^{2}$ . Following this rule to expand it, we have:

$(4xy)^{2}-2(4xy)(18y^{2})+(18y^{2})^{2}$

$16x^{2}y^{2}-144xy^{3}+324y^{4}$

Applying common factor $4y^{2}$ :

$4y^{2}(4x^{2}-36xy+81y^{2})$

Note the polynomial inside the parenthesis is a perfect square trinomial, which can be factored to $(2x-9y)^{2}$ . Hence, the final simplification is:

$4y^{2}(2x-9y)^{2}$

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2 years ago

What number do we divide by -9 to get 8?

Darya [45]

Answer:

-72 i notice you're having trouble message me and ill help you

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3 years ago

The lines shown below are parallel. If the green line has a slope of -27, what is

photoshop1234 [79]

A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely.

The correct option is A.

A line is a one-dimensional shape that is straight, has no thickness, and extends in both directions indefinitely.

The slope of the parallel line is always equal. Given the slope of the green line is -3/7, also, it is parallel to the red line. Therefore, the slope of the red line is -3/7.

Hence, the correct option is A.

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2 years ago

Write the following statements in equation form: If the sum of a number and its two fifth is 70

iren [92.7K]

Answer:

$x + \frac{2}{5} \times x = 70 \\ x + \frac{2}{5} x = 70$