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Answer:

d/ ( a+b) = x

Step-by-step explanation:

d=ax+bx

Factor out x

d = x( a+b)

Divide each side by (a+b)

d/ ( a+b) = x (a+b)/ (a+b)

d/ ( a+b) = x

Answer:

add my sc = bmic ava, no spaces

or add my discord = XoXo_ava

Step-by-step explanation:

hope i can help bbg / bbb :

) !!!

Answer:

The calculated z = 2.85 falls in the critical region z > 1.96 so we accept the null hypothesis that there is no difference between the population proportions for the two years.

Step-by-step explanation:

Let p1 be the sample of 1000 adults chosen in 2012 and

p2 be the sample of 1100 adults chosen in 2010

Part a:

The hypothesis that can be used to test for a significant difference between the population proportions for the two years is:

H0: p1-p2= 0           against the claim      Ha: p1-p2≠0

Part b:

The sample proportion indicating that their financial security was more that fair in 2012 is

p1^= 410/1000= 0.41

In 2010 is:

p2^= 385/1100= 0.35

Part c:

p^c= 410+385/1000+1100= 0.3785

q^c= 1-p^c= 1-0.3785= 0.6124

The critical region is z > ±1.96

The test statistic is

z= p1^- p2^ / sqrt ( p^cq^c( 1/n1+ 1/n2)

z= 0.41-0.35 /sqrt( 0.3785*0.6124(1/1000 +1/1100)

z=  0.06 / 0.021036

z= 2.85

Conclusion

The calculated z = 2.85 falls in the critical region z > 1.96 so we accept the null hypothesis that there is no difference between the population proportions for the two years.

P- value :  0.00466

The result is significant( accept the null hypothesis) for  value less than 0.05

Part d:

                                                     2012                         2010

Sample                                       1000                           1100

Proportions                               0.41                             0.35

Standard Error               √0.41( 0.59)/1000        √0.35( 0.65)/1100

                                               = 0.0155                0.01438

Standard Error for the difference = √0.0155² + 0.01438² =0.0211

p1-p2 ± z* standard error for the difference

0.41-0.35 ± 1.96 *( 0.0211)

0.06 ± 0.041356

-0.018644,   0.101356

The 95 % confidence interval estimate is (-0.018644,   0.10135

4. x= 40

plz mark my answer as brainlist plzzzz.

hope this will be helpful to you .

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Answer:

There will be 132 seats in row 25

Step-by-step explanation:

1st term = 12

common difference = 5

f(x) = 12 + 5(x - 1)

f(25) = 12 + 5(25-1)

f(25) = 12 + 5(24)

f(25)= 12+120

f(25)=132

There will be 132 seats in row 25

The number of seats is 137 with the general equation [tex](12+5n)[/tex] seats

In algebra, an equation can be defined as a mathematical statement consisting of an equal symbol between two algebraic expressions that have the same value.

Let the row number is [tex]n[/tex]

The number of seats in the first row is 12

As per the plan, each row shall have 5 more seats.

So, in the first row seats=12

In the second row seats=[tex]12+5[/tex]

In the third row seats=[tex]12+2\times5[/tex]

[tex]n^{th}[/tex]  row seats=[tex]12+5n[/tex]

So, the number of seats in any row is [tex]12+5n[/tex]

Where [tex]n[/tex] is the row number

Now, for 25 rows, [tex]n=25[/tex] then,

The number of seats is,

[tex]12+5\times25=137[/tex]

Learn more about the topic general equation:

https://brainly.com/question/11242211

Answer: 24

Step-by-step explanation:

Basically you just need to add them simply breaking them up then adding them

Answer:

3 my answer

Step-by-step explanation:

24 divide 8-3

Answer:

a

Step-by-step explanation:

because she only need a half of it

Answer:1/4

Step-by-step explanation:

Answer:

250 grams of the 60% cocoa bar and 150 grams of the 92% cocoa bar should be used.

Step-by-step explanation:

Given that Shani has 2 chocolate bars, one that had 60% cocoa and the other that had 92% cocoa, to determine what mass of each bar must she mix to obtain 400g of chocolate with 72% cocoa, the following calculation must be performed:

100 x 0.6 + 0 x 0.92 = 60

90 x 0.6 + 10 x 0.92 = 63.2

80 x 0.6 + 20 x 0.92 = 66.4

70 x 0.6 + 30 x 0.92 = 69.6

65 x 0.6 + 35 x 0.92 = 71.2

63 x 0.6 + 37 x 0.92 = 71.84

62.5 x 0.6 + 37.5 x 0.92 = 72

400 x 0.625 = 250

Thus, 250 grams of the 60% cocoa bar and 150 grams of the 92% cocoa bar should be used.

Answer:

20 hours

5 hours- 25%

10 hours- 50%

15 hours- 75%

20 hours- 100%

9514 1404 393

Answer:

  f(5) = 0

Step-by-step explanation:

At x=5, the graph is on the x-axis, so the function value is 0 at that point.

  f(5) = 0

Answer:

60

Step-by-step explanation:

50+50+50+50+100= 300

divide by 5 students

300/5 = 60

Answer:

now I can answer correctly!          60 is the average

Step-by-step explanation:

100+50(4) =300

50(4)= 200+100=300

300/5= 60

Answer:

[tex]SW= 15[/tex] and [tex]TW= 24[/tex]

Step-by-step explanation:

Given

See attachment for the triangles

Required

Which additional statement proves the similarity of both triangles

From the attachment:

[tex]ST = 27\\XY = 9\\YZ = 8\\XZ = 5[/tex]  

The similar sides of both triangles are: ST and XY

So:

[tex]Ratio = ST : XY[/tex]

[tex]Ratio = 27 : 9[/tex]

Divide by 9

[tex]Ratio = 3 : 1[/tex]

Another similar sides are: TW and YZ

So:

[tex]TW : YZ = TW : 8[/tex]

Equate both ratios:

[tex]TW : 8 = 3 : 1[/tex]

Represent as fraction

[tex]\frac{TW }{ 8 }= \frac{3 }{ 1}[/tex]

[tex]\frac{TW }{ 8 }= 3[/tex]

Multiply both sides by 8

[tex]8 * \frac{TW }{ 8 }= 3*8[/tex]

[tex]TW= 3*8[/tex]

[tex]TW= 24[/tex]

Another similar sides are: SW and XZ

So:

[tex]SW:XZ = SW:5[/tex]

Equate both ratios:

[tex]SW:5 = 3:1[/tex]

Represent as fraction

[tex]\frac{SW}{5} = \frac{3}{1}[/tex]

[tex]\frac{SW}{5} = 3[/tex]

Multiply both sides by 5

[tex]5*\frac{SW}{5} = 3*5[/tex]

[tex]SW = 3*5[/tex]

[tex]SW = 15[/tex]

So, the statement that proves the similarity of the triangles is:

[tex]SW= 15[/tex] and [tex]TW= 24[/tex]

Answer:

306

Step-by-step explanation:

LOL

Answer:

306

Step-by-step explanation:

so 9+3=12+8+100=108+12=120+34=154+28=182 then u add it all together

Answer:

-12

Step-by-step explanation:

in an iscocles, the base angles equal eachother so,

73=x+85

x=-12

Answer: A

Step-by-step explanation:

Answer:

$45

Step-by-step explanation:

bank account=$50

Allowance=$20

mows two lawns at $10 each=$20

$50+$20+$20=

money in bank=$90

video game=$45

$90-$45=$45

               10  20 30  40 45

·___ _ ·_∩_·∩__∩·_∩_∩_·___·_ ·__·___·___·___·___·__

$100  90  80 70  60  50 45  40   30   20   10     0                                                  

Answer:

3

Step-by-step explanation:

what is the 4 in for?

Answer:

2+1=3

I think you copy pasted something else like the '4 in'.

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Answer:

14.52 km/h

Step-by-step explanation:

Please see the picture attached.

I hope this helps!

Answer:

y + 51=99

replace the y with 99

then it becomes 99 - 51

y=48

Answer:

[tex]dx[/tex] denotes an infinitesimal displacement along [tex]x[/tex]

Step-by-step explanation:

The integration refers to the antiderivative of a function. The inverse process of differentiation is the integration.

The integration is used to find the volume and area under the curve.

In ∫ [tex]2x\,\,dx[/tex]

∫ denotes the sign of integral,

[tex]dx[/tex] denotes an infinitesimal displacement along [tex]x[/tex],

[tex]2x[/tex] is the part to be integrated.

Answer:

if a water pipe bursts over night depends on the pressure of the water but i will say a foot or more an hour

Step-by-step explanation:

Answer:

suree.

Step-by-step explanation:

Answer:

area of ABC=1/2 b×h=1/2×20×6=30m²

Answer:

60 m^2

Step-by-step explanation:

( Base * Hight / 2 = Area)

20 * 6 = 120

120 / 2 = 60

Answer:

The second one

Step-by-step explanation:

Since the equation is X is greater than or equal to 11, because of the line under it, the "or equal to" it is a closed dot. (If it didn't have that line under it, it would be an open dot.) And, how I like to explain which way the blue arrow goes, the ">" kind of looks like the tip of an arrow, so the blue arrow should go the same way. For example, ">" seems like an arrow going this way "-->", or "<" seems like an arrow going this way "<--"!

Answer:

B, is the correct option.

Step-by-step explanation:

because x is greater than or equal to 11.

Si tiene 80 cm de altura mier 800 milímetros de altura