All categories

2 years ago

The bottom one says 9/2 so please help with these questions, I have more on my profile.

Mathematics

1 answer:

eimsori [14]2 years ago

7 0

18. Solve for x by factoring diamond method

10x^2 - 29x - 21 = 0 becomes

(2x - 7)(5x + 3) = 0

x = 7/2, -3/5

19. To model this we will do

(x + 9)(x + 9) = 169

distribute

x^2 + 18x - 88 = 0

factor

(x - 4)(x + 22) = 0

The length is 4m

20. This can be modeled by

(l)(l +5) = 234

distribute

l^2 + 5l -234 = 0

factor

(l-13)(l+18) = 0

The length is 13

The width is 18

21. To find this you divide the x term by 2 and square it so

10/2 = 5

5^2

22. To find this you divide the x term by 2 and square it so

9/2 = 4.5

4.5^2

81/4

You might be interested in

Pls solve this problem!!

castortr0y [4]

264.8 is your answer

6 0

2 years ago

Read 2 more answers

after making a deposit Puja had $264 in her savings account she knows that if she added $26 to the mouth originally in the accou

alex41 [277]

Answer:

$106.00

Step-by-step explanation:

origional amount = x

x + 26 + x + 26 = 264

2x + 52 = 264

2x = 264 - 52

2x = 212

x = 212/2

= 106

Hope this helps you! Have an amazing day :)

3 0

3 years ago

You wonder if weather (rain, cloudy or sunny) makes a difference on mood (happy or not). To determine this, you sample the moods

gizmo_the_mogwai [7]

Answer:

Step-by-step explanation:

Drawing a table to show the different weather and mood options :

The degree of freedom :

________ WEATHER ________

__________Rain ____ sunny _____ cloudy

Happy

Not happy

Here, we have a contingency table formatted in rows and columns

The columns = 3

The rows = 2

Degree of freedom :

(rows - 1) * ( columns - 1)

(2 - 1) * (3 - 1)

1 * 2

= 2

The degree of freedom = 2

6 0

2 years ago

Write the partial fraction decomposition fro the ration expression below

zlopas [31]

$\dfrac{5x-2}{(x-1)^2}=\dfrac a{x-1}+\dfrac b{(x-1)^2}$
$5x-2=a(x-1)+b$

Since $5x-2=5x-5+3=5(x-1)+3$ , it follows that $a=5$ and $b=3$ , so

$\dfrac{5x-2}{(x-1)^2}=\dfrac5{x-1}+\dfrac3{(x-1)^2}$

$\dfrac{x^3+x^2+x+2}{x^4+x^2}=\dfrac{x^3+x+x+2}{x^2(x^2+1)}=\dfrac ax+\dfrac b{x^2}+\dfrac{cx+d}{x^2+1}$
$x^3+x^2+x+2=ax(x^2+1)+b(x^2+1)+(cx+d)x^2$
$x^3+x^2+x+2=(a+c)x^3+(b+d)x^2+ax+b$

When $x=0$ , you find that $b=2$ . It's also clear that $a=1$ . So the remaining constants must be $1+c=1\implies c=0$ and $2+d=1\implies d=-1$ , and so you get

$\dfrac{x^3+x^2+x+2}{x^4+x^2}=\dfrac1x+\dfrac2{x^2}-\dfrac1{x^2+1}$

6 0

3 years ago

Given a mean of 571 and a standard deviation of 236.5, what is the z-score of the value 724 rounded to the nearest tenth? a.0.9

tangare [24]

The answer to this question is 0.6.

6 0

3 years ago

Read 2 more answers