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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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Can you guys help me​
natita [175]

Answer:

would be A

Step-by-step explanation:

because bisecting means both sides equal the same. so 4x-12 times two is 8x-24. Hope this helps

4 0
4 years ago
Read 2 more answers
(x-2) is a factor of x^2-3x^2+kx+14. The value of k is?​
BartSMP [9]

Answer:

k = 5

Step-by-step explanation:

I will assume that your polynomial is

x^2 - 3x^2 + kx + 14

If x - a is a factor of this polynomial, then a is a root.

Use synthetic division to divide (x - 2) into x^2 - 3x^2 + kx + 14:

 2      /      1     -3     k     14

                        2     -2    2k - 4

         -------------------------------------

               1        -1    (k - 2)   2k - 10

If 2 is a root (if x - 2 is a factor), then the remainder must be zero.

Setting 2k - 10 = to zero, we get k = 5.

The value of k is 5 and the polynomial is x^2 - 3x^2 + 5x + 14

6 0
3 years ago
What is the scale factor for pre-image IJKH to image MNOL?
solniwko [45]

Answer:

Step-by-step explanation:

Given are two rectangles MNOL and IJKH

MNOL is the image and IJKH is the preimage.

OBviously similarity is preserved between these.

Hence sides will be proportional

i.e. l1/l2 = w1/w2 = Scale factor k

This can also be written as

Scale factor square = k^2=\sqrt{ \frac{areaI}{area2} }

Scale factor = square root of ratio of rectangle areas

Find ratio as

\frac{375}{135} =\frac{25}{9}

k = Scale factor = square root of the above fraction

=\frac{5}{3}

5 0
4 years ago
Am I right?
MariettaO [177]
Yes, your answer is right.
5 0
3 years ago
Please help i have no clue what to do <br> i suck at math
beks73 [17]
The first one is 63.9 and the second should be 116.1
3 0
3 years ago
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