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3 years ago

7

Subtract 7x^2+4x-9 from 5x^2+10x-5. Express the answer in descending degree order

2 answers:

nata0808 [166]3 years ago

4 0

Hi there!

To subtract this, we can only subtract like terms. That means we only subtract 7x^2 and 5x^2, 4x and 10x, and -9 and -5. It might make more sense after the work below:

7x^2 - 5x^2 = 2x^2
4x - 10x = -6x
-9 - -5 = -4

So, the answer is 2x^2 - 6x - 4

Hope this helps!

Ugo [173]3 years ago

4 0

Answer:

2x^2 - 6x - 4

Step-by-step explanation:

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Investors buy a studio apartment for 120000 of this amount they have down payment of 24000 their down payment is what percent of

Yakvenalex [24]

Answer:

1. 20%

2. 40%

Step-by-step explanation:

To find the percent of the total payment that the down payment is we have to you use the following equation:

$\frac{part}{whole} * 100 = percent$

Lets start plugging things into the equation.

The part is equal to the down payment and the whole is the total cost of the studio apartment.

Let's do this for the first question

$\frac{24,000}{120,000} * 100 = 20%$

So we see that 24,000 is 20% of the total purchase price!

Let's do this for the next question:

$\frac{48,000}{120,000} * 100 = 40$

48,000 is 40% of the 120,000 total cost!

<em>Hope this helps!</em>

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7 0

3 years ago

Combine the following expressions:

melisa1 [442]

ANSWER

$(4n - 1)\sqrt{3 n} + 3\sqrt{n}$

EXPLANATION

The given expression is

$\sqrt{48 {n}^{3} } + \sqrt{9n} - \sqrt{3n}$

We remove the perfect squares under the radical sign.

$\sqrt{16 {n}^{2} \times3 n} + \sqrt{9n} - \sqrt{3n}$

We can now take square root of the perfect squares and simplify them further.

$\sqrt{16 {n}^{2}} \times \sqrt{3 n} + \sqrt{9} \times \sqrt{n} - \sqrt{3n}$

This simplifies to:

$4n\sqrt{3 n} + 3\sqrt{n} - \sqrt{3n}$

This further simplifies to:

$(4n - 1)\sqrt{3 n} + 3\sqrt{n}$

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2 years ago

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Andrew [12]

I need question for the "factor" problem

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3 years ago

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Quadrilateral A B C D is shown. Sides A D and B C are parallel. Sides A B and C D are congruent. Angle A is 115 degrees. What is

brilliants [131]

Step-by-step explanation:

Since sides AD and BC are parallel,

Angle BAD + Angle ADC = 180° (co-interior angles)

Therefore Angle ADC = 180° - 115° = 65°.

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3 years ago

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Which of the following is equal to the fraction below? (3/4)^-5

DaniilM [7]

Answer:

4.21399176955

Step-by-step explanation:

$\frac{3}{4}^{-5}$

$0.75^{-5}$

4.21399176955

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