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Alenkasestr [34]
3 years ago
15

Find the missing value: x2 (squared) = 625 5 10 25 50

Mathematics
2 answers:
faust18 [17]3 years ago
6 0
25! Kqkakkajk jajajajqjkkkwkakana
Alona [7]3 years ago
5 0

\bf x^2=625\implies x=\sqrt{625}\implies x=25

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 11       12       13       14     A customer buys 17.01 in gas and requests one five dollar [$5] lottery ticket, two one dollar
Dafna11 [192]
The customer gave me:
-- a ticket worth  $5
-- a ticket worth  $2
-- a bill worth      $100
     Total. . . . . . .$107

I gave him:
-- some gas worth  $17.01
-- a ticket worth       $  5
-- two $1 tickets      $  2
-- a ticket worth       $  3
        Total. . . . . . . .$27.01

The total value of everything we trade has to be equal.

I owe him    ( $107.00  -  $27.01 )  =   $79.99 in change
4 0
3 years ago
An article presents a study of health outcomes in women with symptoms of heart disease. In a sample of 115 women whose test resu
My name is Ann [436]

Answer:

z(s) is in the rejection region we reject H₀     μ₁  = μ₂  and support the claim that at CI 95 % the means of the two groups differs

Step-by-step explanation:

Sample 1:

Sise sample   n₁  =  115

μ₁  = 169,9 mmHg

σ₁  = 24,8 mmHg

Sample 2:

Sise sample   n₂  =  235

μ₂  = 163,3 mmHg

σ₂  = 25,8 mmHg

We can develop a test hypothesis for differences in means to investigate if the mean peak systolic blood pressure differs between these two groups

We will choose CI = 95 %   then significance level  α  = 5 %

α = 0,05     α/2 = 0,025

z(c) for 0,025 is from z-table   z(c) = 1,96

Test Hypothesis:

Null Hypothesis                                  H₀           μ₁  = μ₂

Alternative Hypothesis                      Hₐ            μ₁  ≠ μ₂

The alternative hypothesis tells us that the test is a two-tail test.

z(s)  =  ( μ₁  - μ₂ ) / √ σ₁²/n₁  + σ₂²/n₂

z(s)  = ( 169,9  -163,3 ) / √ (24,8)² /115   +  ( 25,8)²/235

z(s)  =  6,6  / √5,35 + 2,83

z(s)  =  6,6  / 2,86

z(s) = 2,30

Comparing  |z(c)|    and  |z(s)|

z(s) > z(c)

z(s) is in the rejection region we reject H₀     μ₁  = μ₂  and support the claim that at CI 95 % the means of the two groups differs

6 0
2 years ago
Yooo this trippy help
lilavasa [31]

Answer:

-2150000

Step-by-step explanation:

I hope this right cause my head hurt doing that

5 0
3 years ago
What is the area of this trapezoid?<br><br><br><br> Enter your answer in the box.<br><br> = cm²
VLD [36.1K]

A = 440

answer...

A

=

a

+

b

2

h

=

25

+

19

2

·

20

=

440

6 0
2 years ago
6x+3(4x-2)=5(2x-8) the answer is -17/4 but can someone explain how to get that answer? plz help lol​
Sergeu [11.5K]

Answer:

<h2>x =  -  \frac{17}{4}</h2>

Step-by-step explanation:

6x + 3(4x - 2) = 5(2x - 8)

Expand the terms in the bracket and simplify

That's

6x + 12x  - 6 = 10x - 40 \\ 18x - 6 = 10x - 40

Using the subtraction property subtract 10x from both sides of the equation

18x - 10x - 6 = 10x - 10x - 40 \\ 8x - 6 =  - 40

<u>Add 6 to both sides of the equation</u>

8x + 6 - 6 =  - 40 + 6 \\ 8x =  - 34

<u>Divide both sides by 8</u>

\frac{8x}{8}  =  -  \frac{34}{8}

<u>Reduce the fraction with 2</u>

We have the final answer as

x =  -  \frac{17}{4}

Hope this helps you

7 0
3 years ago
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