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4 years ago

Which statements are true about the ordered pair (−1, 5) and the system of equations?

Mathematics

1 answer:

Ira Lisetskai [31]4 years ago

6 0

Answer:

you answer would be A,B,D there all the answer u cant just have one also I just took the test im from k12

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100 POINTS AND BRAINLIEST!!! DONT NEED EXPLANATION JUST NEED THE RIGHT ANSWER A pyramid has a height of 5 in. and a surface area

zepelin [54]

Answer:

180 in2

Step-by-step explanation:

surface areas of similar solids are proportional to the square of their corresponding sides

area of larger/90 = 10^2/5^2

area of larger = 90(100/25) = 180 in^2

4 0

3 years ago

Read 2 more answers

The operations manager at a compact fluorescent light bulb (CFL) factory needs to estimate the mean life of a large shipment of

aliya0001 [1]

Answer:

The 95% confidence interval estimate for the population mean life of compact fluorescent light bulbs in this shipment is between 7,255 hours and 7,745 hours.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.95$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{1000}{\sqrt{64}} = 245$

The lower end of the interval is the sample mean subtracted by M. So it is 7500 - 245 = 7255 hours.

The upper end of the interval is the sample mean added to M. So it is 7500 + 245 = 7745 hours.

The 95% confidence interval estimate for the population mean life of compact fluorescent light bulbs in this shipment is between 7,255 hours and 7,745 hours.

7 0

3 years ago

Using the number line as a guide, work out the difference between the numbers given.

inn [45]

Answer:

If these are addition:

1) 7

2) 3

3) 1

4) -3

5) 0

6) -5

If they are subtraction:

1) 9

2) 9

3) -7

4) 7

5) -4

6) 3

Step-by-step explanation:

Difference is subtraction, but your examples (7 and -3 = 10) implies that these are addition problems. Next time please set them up in a mathematical form.

This is how the problems would be set up:

Addition:

1) 8+(-1)= 7

2)6+(-3)= 3

3)-3+4= 1

4)2+(-5)= -3

4)-2+(-2)= 0

6)-1+(-4)= -5

Subtraction:

1) 8-(-1)= 9

2)6-(-3)= 9

3)-3-4=- 7

4)2-(-5)= 7

4)-2-(-2)= -4

6)-1-(-4)= 3

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3 years ago

How many problems must be answered correctly on a math test with 60 problems to gets score of 85%

Natalka [10]

51 problems need to be solved

6 0

4 years ago

RSM question need answer today 3-6-20

SpyIntel [72]

Answer:

So, a solution composed of 1188 grams of water and 12 grams of sugar will be 99% water and 1% sugar

Step-by-step explanation:

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3 years ago