All categories

3 years ago

5r2 - 8r =0the 2 is quared.

Mathematics

1 answer:

melamori03 [73]3 years ago

6 0

Answer:

{0, 8/5}

Step-by-step explanation:

Please present this 5r2 - 8r =0 as 5r^2 - 8r = 0 or as 5r² - 8r = 0.

Factoring out the r, we get r(5r - 8) = 0.

Setting each factor = 0 separately and finding r in each case, we get:

r = 0 and

5r = 8, so that r = 8/5.

The roots of this polynomial equation are {0, 8/5}.

You might be interested in

If x is -3 and y is 2 what is x ^ 2 + y ^ 2

Pavlova-9 [17]

Answer:

ans=-2

Step-by-step explanation:

-3*2+2*2

=-6+4

=-2

4 0

3 years ago

What's the right answer?

Masja [62]

Given:

$sinh(f(x))=1+x^2$

To find:

The value of f'(x).

Solution:

Formulae used:

$\dfrac{d}{dx}sinh(x)=cosh(x)$

$\dfrac{d}{dx}x^n=nx^{n-1}$

$\dfrac{d}{dx}C=0$

Chain rule:

$\dfrac{d}{dx}[f(g(x))]=f'(g(x))g'(x)$

Where C is an arbitrary constant.

We have,

$sinh(f(x))=1+x^2$

Differentiate with respect to x.

$cosh(f(x))f'(x)=0+2x$

$f'(x)=\dfrac{2x}{cosh(f(x))}$

Therefore, the required values is $f'(x)=\dfrac{2x}{cosh(f(x))}$ .

7 0

3 years ago

Need help plz .You have $2500 to invest in two different accounts. In order to save the money you need for college, you need to

siniylev [52]

I’m pretty sure that it’s C

7 0

3 years ago

Read 2 more answers

Which of the following accurately describes an effect of smoking?

stepladder [879]

You haven't posted the answer choices, but I think I've run across this question before and remember the answer. The answer should be whichever letter says as follows: "Smoking damages cilia in the trachea and more particles enter the lungs. Hope this helps!~

6 0

3 years ago

Using the image above, what is the measure of Side AC? Round to the nearest hundredth

Evgesh-ka [11]

To solve this problem, we just have to use trigonometric ratios and apply which of the ratios is needed here and proceed to solve. The value of side AC is 2.85 units

<h3>Trigonometric Ratio</h3>

In the given diagram, we have the value of angle and hypothenuse and we are required to find the adjacent side of the triangle.

Data;

Angle = 32.9 degrees
Hypothenuse = 3.4

Let's use cosine rule for this.

$cos\theta = \frac{adjacent}{hypothenuse}$

Proceed to substitute the values into the equation and solve.

$cos 32.9 = \frac{AC}{3.4} \\AC=3.4cos32.9\\AC = 2.85$

From the calculations above, the value of side AC is 2.85 units

Learn more on trigonometric ratio here;

brainly.com/question/11967894

#SPJ1

3 0

2 years ago

5r2 - 8r =0the 2 is quared.​

5r2 - 8r =0the 2 is quared.