MATHEMATICS HIGH SCHOOL

What is the mean of the data set? I got 177 when i added up the numbers but what would i divide 177 by?12, 17, 16, 10, 20, 13, 14, 14, 12, 12, 19, 18

A.14.00

B.14.75

C.15.75

D.13.50

Answers

Answer 1
Answer: If you would like to know the mean of the data set, you can calculate this using the following steps:

The mean of the data set is the sum of all the data values divided by the number of these values.
  
12, 17, 16, 10, 20, 13, 14, 14, 12, 12, 19, 18

12 + 17 + 16 + 10 + 20 + 13 + 14 + 14 + 12 + 12 + 19 + 18 = 177
the number of data values: 12
177 / 12 = 14.75

The correct result would be B. 14.75.

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The height , H , in feet of an object above the ground is given by h(t)=-16t^2+64t+190 , where t is the time in seconds . What is the height of the object after 2 seconds

Answers

After 2 seconds.
h(2) = -16(2)^2 + 64(2) + 190 = -16(4) + 128 + 190 = -64 + 128 + 190 = 254 feet

Final answer:

The height of the object after 2 seconds is 254 feet.

Explanation:

The height of an object after 2 seconds can be found by substituting t = 2 into the equation for height:

h(2) = -16(2)² + 64(2) + 190

h(2) = -64 + 128 + 190

h(2) = 254

Therefore, the height of the object after 2 seconds is 254 feet.

Learn more about height here:

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jean needs to graph the function below y= 7x^2 + 8x - 6 How many time should the graph of this function intersect at the x-axis?

Answers

when it intersects the x axis, the y value is 0
0=7x^2+8x-6
2nd degree, therefor there are 2 solutions and also 2 intersections

answe is 2 times

Which is a measure of the efficiency of an investment? return rate return on investment efficiency coefficient

Answers

"return on investment" is the best measure of the efficiency of an investment, but it should be noted that there are other indicators of how well an investment is doing. 

Answer:

The measure of the efficiency of an investment is:

                     Return on investment (ROI)

Step-by-step explanation:

Return on investment (ROI)--

Return on investment is a kind of a performance measure that measures the efficiency of an investment or compare efficiency of different investments.

The formula to calculate ROI is given by:

\text{ROI}=\frac{\text{Benefit\ or\ return\ on\ investment}}{\text{Cost\ of\ investment}}* 100

         Hence, the answer is:

       Return on Investment (ROI)

Estimate the sum by rounding each number to the nearest half or whole.

2 1/2+ 5 5/8

Answers

I believe the answer should be 9. 

Please help this question I need all of them

Answers

a 300m b 300m c 1200m d 5km e 600m f 400m g 2km h 5km. remember that 1 km is equal to 1000m
Answer:
a) 300m
b) 300m
c) 1200m
d) 5km
e) 600m
f) 400m
g) 1km
h) 5km

Explanation: Question is asking you to fill in the missing value to complete the bar model.

Explanation for a:

700m + what equals 1km?
1km is 1000m
1000m - 700m = 300m

Hope this helps! :)

(2k + 3)(k - 1)A. 2k^2 + k – 3
B. 2k^2 + k + 2
C. 2k^2 – k – 3
D. 2k^2 – k + 2

Answers

(2k+3)(k-1)

Use the distribute property

(2k)(k)+(2k)(-1)+(3)(k)+(3)(-1)

= 12k²-2k+3k-3

= 2k²+k-3


The answer is A


Good night

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