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iogann1982 [59]
2 years ago
7

Use substitution to find the integral. (Remember to use absolute values where appropriate.) square root x / x-4

Mathematics
1 answer:
Murljashka [212]2 years ago
6 0

Answer:

Step-by-step explanation:

here is a solution and verify

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What is it 7 points on the board for u plz answer CORRECTTT
pochemuha

Answer:

x is 30

Step-by-step explanation:

1/2 ( x + 6 ) = 18

1/2x + 3 = 18

       - 3    - 3

1/2x = 15

· 2      · 2

x = 30

5 0
3 years ago
Please I have my final now can someone help me with this fast
Mariana [72]

Answer:

option B

Step-by-step explanation:

Given :

y = \frac{2}{3}x + 3\\\\y = \frac{5}{2}x + \frac{7}{2}\\\\

Step 1 : simplify the equation :

3y = 2x + 9\\\\2y = 5x + 7\\

Step 2: Arrange the terms :

2x - 3y = - 9\\\\5x -2 y = -7

Step 3 : Solve for x and y :

                                2x - 3y = - 9 ------ ( 1 )

                                5x - 2y = - 7 --------- ( 2 )

                              _____________________

              ( 1 ) x 5 => 10x - 15y = - 45    ---------- (3 )

              ( 2) x 2 => 10x - 4y = - 14    ----------- (4 )

                             _______________________              

           ( 3 ) - ( 4 ) =>  0x - 11y = - 31

                                    - 11 y = - 31

                                        y = \frac{31}{11}

              Substitute y in ( 1 ) :

                     2x - 3y = - 9

                     2x - 3 (\frac{31}{11}) = - 9\\\\2x = -9 + 3(\frac{31}{11})\\\\2x = - 9 + \frac{93}{11}\\\\2x = \frac{-99 + 93}{11} \\\\2x = \frac{-6}{11} \\\\x = \frac{-6}{2 \times 11} = -\frac{3}{11}

Therefore the solution to the sytem is ( - \frac{3}{11} , \frac{31}{11})

The solution of the system of equation is a point which lies

on the both the lines.

Option A : False ,  It says the solution lies above one of the given line.

               But the solution of the system of equation always lies on

                both the line.

                     

Option B : True , says the solution is a point on the coordinate plane.

Option C : False, because if the solution is on the x-axis , then

                  the y coordinate in the solution would be zero.

                   But it  is not zero.

Option D : False , the solution is the point where both the lines intersect.

8 0
3 years ago
An airplane on autopilot took 5 hours to travel 3,640 kilometers. What is the unit rate for kilometers per hour?
aalyn [17]
728 km per hour

3640 divided by 5 to find the unit rate for kilometers per hour
7 0
3 years ago
n=400 people under the age of 25 was asked whether they check social media sites right after they wake up. 42% check social medi
Aliun [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test.

For the null hypothesis,

p = 0.5

For the alternative hypothesis,

p < 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

P = 42/100 = 0.42

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

n = 400

z = (0.42 - 0.5)/√(0.5 × 0.5)/400 = - 3.2

Recall, population proportion, p = 0.5

We want the area to the left of 0.5 since the alternative hypothesis is lesser than 0.5. Therefore, from the normal distribution table, the probability of getting a proportion < 0.5 is 0.00069

So p value = 0.00069

Since alpha, 0.05 > than the p value, 0.00069, then we would reject the null hypothesis.

Therefore, there is significant evidence to conclude that that less than 50% of people under the age of 25 check social media sites right after they wake up.

7 0
3 years ago
Need help<br><br><br><br><br><br> Nnsndndndnddn
Ksju [112]

Answer:

A. x = 50

Step-by-step explanation:

x° + (x + 10)° + (x + 20)° = 180° (sum of interior angles of a triangle)

Solve for x

x + x + 10 + x + 20 = 180

Add like terms

x + x + x + 10 + 20 = 180

3x + 30 = 180

Subtract 30 from each side

3x + 30 - 30 = 180 - 30

3x = 150

Divide both sides by 3

3x/3 = 150/3

x = 50

7 0
3 years ago
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