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bagirrra123 [75]
3 years ago
13

Help me pleaseeeeeeeeeeeeee

Mathematics
2 answers:
gavmur [86]3 years ago
5 0

Answer:

68/35 hope this helps

Step-by-step explanation:

AnnZ [28]3 years ago
3 0

Answer:

66.5

Step-by-step explanation:

In numerical order: 35, 49, 58, 61, 65, 68, 72, 78, 88, 91

The median is the number in the middle or in this case, the average of 65 & 68 which is 66.5

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10(8r+23) =1430 <br> HELP PLS ITS FOR MY HW PLS PLS PLS
Mademuasel [1]

Answer:

r = 15

Step-by-step explanation:

10(8r + 23) = 1430

Divide both sides by 10.

8r + 23 = 143

Subtract 23 from both sides.

8r = 120

Divide both sides by 8.

r = 15

7 0
3 years ago
Expand it <br> (2/7z -3/5x)2
svet-max [94.6K]
( 2 / 7 z - 3 / 5 x ) 2
3 0
3 years ago
As a store manger you would like to find out the average time it takes to unload the truck which delivers the merchandise for yo
Georgia [21]

Answer:

The upper boundary of the 95% confidence interval for the average unload time is 264.97 minutes

Step-by-step explanation:

We have the standard deviation for the sample, but not for the population, so we use the students t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 35 - 1 = 35

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 34 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.975([tex]t_{975}). So we have T = 2.0322

The margin of error is:

M = T*s = 2.0322*30 = 60.97

The upper end of the interval is the sample mean added to M. So it is 204 + 60.97 = 264.97

The upper boundary of the 95% confidence interval for the average unload time is 264.97 minutes

4 0
3 years ago
Read 2 more answers
Cant solve this please help me <br><br> 9x-2y=8 <br> Y=2x+1
ki77a [65]
Substitute 2x+1 where y is in the equation:

9x-2(2x+1)=8

Then distribute the -2(2x+1)

9x-4x+2=8

Then combine like terms (the x)

5x+2=8

Then do -2 on both side of the equation sign

5x+2=8
- 2 -2

Then you'd get

5x=6

Then divide 5 on both sides

X= 1.2
5 0
3 years ago
Read 2 more answers
13. A jeweller bought an engagement ring for €1200 and
maks197457 [2]

Answer:

CP of ring = 1200

profit % = 15%

Profit amount = 15% 0f 1200 = 180

SP = 1200 + 180 = 1380

3 0
3 years ago
Read 2 more answers
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