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FromTheMoon [43]
3 years ago
14

7 is the mean proportional between 2 and a number. Find the number, show all work.

Mathematics
2 answers:
erastova [34]3 years ago
7 0

Answer:

24½

Step-by-step explanation:

7 = sqrt(x × 2)

7² = 2x

x = 49/2

Dmitry_Shevchenko [17]3 years ago
4 0

Answer:

12

Step-by-step explanation:

Follow me please for answering the question

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this trinomial is prime, and cannot be factored.

Step-by-step explanation:

when expanding the equation, you multiply the last term by the first term's coefficient, and then find two factors that multiply to that product, and sum to the middle coefficient.

1 * 19 = 19

there are no factors that will multiply to 19 and sum to 11. thus, this polynomial is prime.

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Read 2 more answers
the hight, the feet, of a javelin t seconds afther it is moldeled by the function (t) =4t^2 + 24t + 6. Afther how many seconds d
ruslelena [56]
The max height will be reached after 3 seconds.

You have a typo in your equation. For this type of quadratic equation, it always starts out with a negative coefficient of the t squared term.

To find the x-coordinate of the vertex, we just need to use the expression: -b/2a.

Then, we have:

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3
8 0
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