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2 years ago

Need the answer for numbers 4,8,and 12

Mathematics

1 answer:

anzhelika [568]2 years ago

8 0

9514 1404 393

Answer:

4) -438.75

8) 539.68

12) 22.54

Step-by-step explanation:

Put the values in place of the corresponding variables and do the arithmetic.

4) 6xy = 6(-7 1/2)(9 3/4) = -6(7.5)(9.75) = -438.75

8) I = prt = $2442 × 0.085 × 2.6 = $539.68

12) I = prt = ($578)(0.0325)(1.2) = $22.54

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Sunny_sXe [5.5K]

Answer:

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Step-by-step explanation:

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2 years ago

What is the percent of change if 20 is increased to 25?

natima [27]

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3 years ago

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The sales tax for an item was $24.50 and it cost $490 before tax.

Ymorist [56]

The sales tax rate is 5%.

Step-by-step explanation:

Given,

Sales tax for an item = $24.50

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$Sales\ tax\ rate=\frac{24.50}{490}*100\\\\Sales\ tax\ rate=\frac{2450}{490}\\\\Sales\ tax\ rate=5\%$

The sales tax rate is 5%.

Keywords: sales tax, percentage

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3 years ago

(x^2–x–4)multiplied by(x–5)

Sergio [31]

$(x-5)(x^2-x-4) =x^3-6x^2+x+20$

Step-by-step explanation:

Given polynomials are:

$x^2-x-4\\and\\x-5$

Both polynomials have to be multiplied. We will use distributive property for the said purpose

So,

$(x-5)(x^2-x-4)\\=x(x^2-x-4)-5(x^2-x-4)\\=x^3-x^2-4x-5x^2+5x+20$

Combining alike terms

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Hence,

$(x-5)(x^2-x-4) =x^3-6x^2+x+20$

Keywords: Polynomials, Multiplication

Learn more about polynomials at:

#LearnwithBrainly

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2 years ago