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3 years ago

Can you please tell me what -4x + 9x is?

Mathematics

2 answers:

Natasha2012 [34]3 years ago

4 0

Answer:

$\boxed{ - 4x +9 x = ( - 4 + 9)x = 5x}\\$

<h3><u>5x</u> is the right answer.</h3>

Luba_88 [7]3 years ago

3 0

Answer = 5x

Explanation: Collect the like terms by calculating the sum or difference of their coefficients which would get you (-4 + 9)x
Then you calculate the sum which gets you 5x

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Answer:

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Step-by-step explanation:

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3 years ago

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When gold medalist Ren Qian prepared for her dive from the 10 meter platform during the

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Answer:

Ren was 27.5 meters away from her family.

Step-by-step explanation:

Ren Qian was at a height of 10 meters to the ground. Let the distance from her vertical point on the ground to her family (i.e the ground distance) be represented by x.

But the angle of depression is measured with respect to the horizontal plane, so;

the vertical angle = $90^{o}$ - 20°

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Applying the appropriate trigonometric function, we have;

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3 years ago

A piece of wire of length L will be cut into two pieces, one piece to form a square and the other piece to form an equilateral t

inn [45]

Answer:

(a) square: L; triangle: 0.

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Step-by-step explanation:

<u>Strategy</u>: First we will write each area in terms of its perimeter. Then we will find the total area in terms of the amount devoted to the square. Differentiating will give a way to find the minimum total area.

In terms of its perimeter p, the area of a square is ...

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In terms of its perimeter p, the area of an equilateral triangle is ...

A_triangle = p^2/(12√3)

Then the total area of the two figures whose total perimeter is L with "x" devoted to the square is ...

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dA/dx = x/8 -(L-x)/(6√3)

This will be zero when ...

x/8 = (L-x)/(6√3)

x(6√3) = 8L -8x

x(8 +6√3) = 8L

x = L·8/(6√3 +8) = 8L(6√3 -8)/(64-108)

x = L·(12√3 -16)/11

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3 years ago

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kakasveta [241]

Answer:

Step-by-step explanation:

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3 years ago

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4 years ago

Can you please tell me what -4x + 9x is? ​

Can you please tell me what -4x + 9x is?