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4 years ago

In the diagram KN bisects JKM and JKM forms a right angle. Which angle can you use to deduce about m

Mathematics

1 answer:

Klio2033 [76]4 years ago

7 0

JKM would be the right angle Your Welcome ^-^-^-^

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A company is developing a new high-performance wax for cross country ski racing. In order to justify the price marketing wants,

andrew11 [14]

Answer:

A)Yes they should market the wax, because it melts before 55 seconds

C) Null hypothesis: mean <55 vs. Alternative hypothesis :mean =55

D) the value is 51.33 seconds

Step-by-step explanation:

The selected samples for the champion are : 57.9, 62.9, 50.6, 50.5,48.2,47.2,50.2 and 43.1

The mean is ;

Sum =57.9 + 62.9 + 50.6 + 50.5+48.2+47.2+50.2+ 43.1 =410.6

Mean= 410.6/8 =51.33= mean

Assuming Significant =0.05 thus applying this level will give you 51.28-51.38

if specifically, the mean time to finish their standard test course should be less than 55 seconds for a former Olympic champion, then the null hypothesis is correct

Then;

Null hypothesis: mean <55

Alternative hypothesis :mean =55

7 0

3 years ago

Todd says (1,4) is a solution to y=2x +2. Is he correct?

Alexxandr [17]

Yes, Todd is correct.

y= 2x+2

(1,4)

1=x, 4=y

Plug the numbers in:

4= 2(1)+2

4= 2+2

4=4

4 0

3 years ago

Read 2 more answers

What is the step by step process of this problem? 6+2[-8-3(2x+4)]+10x

Romashka [77]

So with more than one pair of parentheses, you must start from the inside and make your way outside.

So firstly, distribute -3 to (2x + 4):

$6+2[-8-6x-12]+10x$

Next, combine like terms:

$6+2[-6x-20]+10x$

Next, distribute 2 to [-6x - 20]:

$6-12x-40+10x$

Lastly, combine like terms and your final answer will be $-2x-34$ 

6 0

3 years ago

A property sells for 130,000. If a seller pays 6 percent commission and 800 in closing costs, what are the net proceeds?

anastassius [24]

$130000-6%=$122,200 - $800 = $121,400

8 0

4 years ago

Find the standard deviation if the mean of a sample is 72, a z-score of 3 Raw Score: 42 Raw Score: 81

Fynjy0 [20]

Answer:

a) when x = Raw Score: 42

Standard deviation = σ = -10.3

b) Raw Score: 81

Standard deviation = σ = 2.67

Step-by-step explanation:

Find the standard deviation if the mean of a sample is 72, a z-score of 3

Z score formula is given :

z = (x-μ)/σ,

where

x is the raw score

μ is the population mean = 73

σ is the population standard deviation

z = 3

a) when x = Raw Score: 42

z = (x-μ)/σ

3 = 42 - 73/σ

Cross Multiply

3σ = 42 - 73

3σ = -31

σ = -31/3

σ = -10.3

b) Raw Score: 81

z = (x-μ)/σ

3 = 81 - 73/σ

Cross Multiply

3σ = 81 - 73

3σ = 8

σ = 8/3

σ = 2.67

6 0

3 years ago