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sleet_krkn [62]
3 years ago
5

13 p question pleeeaaassseee guys need help. Will mark brainliest 5 points and thankyou pleass guys this is urgent.

Mathematics
1 answer:
Svet_ta [14]3 years ago
7 0

A. yes

B. no

already did this hope this helps please mark brainliest

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Solve the system by substitution.<br> -2x + 7y = 15<br> бу = 3
Salsk061 [2.6K]

Answer:

Step-by-step explanation:

-2x + 7(1/2) =15

-4x +7 =30

-4x =23

x=-23/4

6 0
3 years ago
Answer this with a fraction:
Neporo4naja [7]
Exact form 27/4
decimal form 6.75
mixed number form 6(3/4)
6 0
3 years ago
Categorize the graph as linear increasing, linear decreasing, exponential
Artist 52 [7]

Answer:

B. Linear increasing

Step-by-step explanation:

decay means decreasing

exponential graph would have a curve

6 0
2 years ago
Read 2 more answers
A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company prod
tekilochka [14]

Answer:

C) 515 hours.

D) 500 hours

c) sample 3

Step-by-step explanation:

1. Sample 2 mean = x2`= ∑x2/n2= 2060/4= 515 hours

Sample Service Life (hours)

1                2              3

495      525            470

500         515           480

505        505            460

<u>500         515             470        </u>

<u>∑2000     2060         1880</u>

x1`= ∑x1/n1= 2000/4= 500 hours

x2`= ∑x2/n2= 2060/4= 515 hours

x3`= ∑x3/n3= 1880/4=  470 hours

2. The mean of the sampling distribution of sample means for whenever service life is in control is 500 hours . It is the given mean in the question and the limits are determined by using  μ ± σ , μ±2 σ  or μ ± 3 σ.

In this question the limits are determined by using  μ ± σ .

3. Upper control limit = UCL = 520 hours

Lower Control Limit= LCL = 480 Hours

Sample 1 mean = x1`= ∑x1/n1= 2000/4= 500 hours

Sample 2 mean = x2`= ∑x2/n2= 2060/4= 515 hours

Sample 3 mean = x3`= ∑x3/n3= 1880/4=  470 hours

This means that the sample mean must lie within the range 480-520 hours but sample 3 has a mean of 470 which is out of the given limit.

We see that the sample 3 mean is lower than the LCL. The other  two means are within the given UCL and LCL.

This can be shown by the diagram.

8 0
2 years ago
Need answer ASAP please hurry??
lara [203]

Answer:

The Car would release over 360 tons of carbon dioxide in 10 years.

36x10 = 360

Step-by-step explanation:

Hope this helps!

8 0
3 years ago
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