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2 years ago

What are numbers 13 and 14

Mathematics

1 answer:

romanna [79]2 years ago

8 0

Answer:

13. 15

14. 3

Step-by-step explanation:

Translate words into an equation by taking apart sections. Then isolate the variable.

13. 27 is 12 more than a number x

"27" 27

"is" =

"12 more than a number x" x + 12

27 = x + 12

27 - 12 = x + 12 - 12 Subtract 12 from both sides. "x" will be isolated (alone).

15 = x Answer

x = 15 Writing variable on the left side is standrad

14. The difference of a number p and -9 is 12

"The difference of a number p and -9" |p - (-9)|

"is" =

"12" 12

|p - (-9)| = 12 Subtracting a negative number becomes adding

|p + 9| = 12

|p + 9 - 9| = 12 - 9 Subtract 9 from both sides

p = 3 The | | can be worked around, it just keeps "p" positive.

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2 years ago

A car dealership has various combinations of vehicles in their car lot, all of which have an equally likely change of being sele

Effectus [21]

Answer:

The probability of a car being selected will be given by :the number of car required/ the total number of cars

Step-by-step explanation:

Probability is the likelihood of an event occurring.

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7 0

2 years ago

Can somebody help me please

Mrac [35]

Answer:
A=(1/2)BxH
10x6=60m

4 0

2 years ago

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Can someone help me solve this? Pls and ty!

Zanzabum

Answer:

H. 95°

Step-by-step explanation:

m∠BGC is 10° smaller than m∠CGD, which means that m∠BGC is x° - 10°

m∠DGE is 25° more than m∠EGF, which means that m∠DGE is x° + 25°

The sum of all angles in a placement like this will always equal 360°

So we put all the measures of all angles on one side of thee equation and set it equal to 360*

x° + x° - 10° + 2x° + 25° + 2x° + 3x° + 30° = 360°

After combining like terms we get 9x° + 45° = 360°

After some algebra we get x = 35°

Now at the start we said that m∠DGE is x + 25°

Plug in 35° for x and we get 35° + 25°

The final answer is m∠DGE = 95°

Edit: Sorry if my answer looks a bit confusing. This is actually my first answer on Brainly so I'm quite new to this experience.

5 0

1 year ago

Read 2 more answers

The principal randomly selected six students to take an aptitude test. their scores were: 81.4 78.6 71.3 77.8 76.9 77.7 determin

Firdavs [7]

The confidence interval is $77.28\pm 2.23$ .

We first find the mean. Add together all of the data points and divide by 6, the number of data points; the mean is 77.28.

Next we find the standard deviation. Find the difference between each data point and the mean; square it; find the sum; divide by the number of data points; take the square root. The standard deviation is 3.32.

To find the margin of error, we calculate the z-score associated with this level of confidence. 100-90 = 10% = 0.1; 0.1/2 = 0.05; 1-0.05 = 0.95. Using a z-table (http://www.z-table.com) we see that this is between two scores, 1.64 and 1.65; we will use 1.645.

The margin of error is given by
z * (σ/√n) = 1.645*(3.32/√6) = 2.23.

Thus the confidence interval is 77.28 +/ 2.23.

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2 years ago