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seraphim [82]
3 years ago
5

Tell whether the ratios form a proportion. 21:3 and 16:6​

Mathematics
1 answer:
lesya692 [45]3 years ago
4 0

Answer:

Step-by-step explanation:

21/3 = 16/6

126 ≠ 48

does not form a proportion

You might be interested in
Factor the polynomial.<br> 13x² – 20x – 12
erma4kov [3.2K]

Answer:

(13 x + 6) (x - 2)

Step-by-step explanation:

Factor the following:

13 x^2 - 20 x - 12

Factor the quadratic 13 x^2 - 20 x - 12. The coefficient of x^2 is 13 and the constant term is -12. The product of 13 and -12 is -156. The factors of -156 which sum to -20 are 6 and -26. So 13 x^2 - 20 x - 12 = 13 x^2 - 26 x + 6 x - 12 = x (13 x + 6) - 2 (13 x + 6):

x (13 x + 6) - 2 (13 x + 6)

Factor 13 x + 6 from x (13 x + 6) - 2 (13 x + 6):

Answer: (13 x + 6) (x - 2)

6 0
4 years ago
If Jeffrey invested $2,000 (principal) for 5 years at 5% interest rate compounded annually how much Interest would he earn over
garik1379 [7]

Answer:

Total = principal * (1+ rate/100)^ years

Total = 2,000 * 1.05^5

Total = 2,000 * 1.2762815625

Total = 2,552.36

Source: http://www.1728.org/compint2.htm

Step-by-step explanation:

3 0
3 years ago
Jen knows that (-1, 41) and (5, 41) lie on a parabola defined by the equation y=4x^2-16x+21. How can I find the coordinates of t
andreyandreev [35.5K]
The vertex is at (2, 5).

To find the vertex, we first find the axis of symmetry; this is given by

x = -b/2a

For our equation, b = -16 and a = 4:
x = -(-16)/2(4) = 16/8 = 2

We substitute this back into our equation:
y = 4(2)² - 16(2) + 21 = 4(4) - 32 + 21 = 5

Therefore the vertex is at (2, 5).
8 0
3 years ago
Find the circumference of a circle with a diameter of 18 in
brilliants [131]

Here is your answer

\bold{56.52 in}

REASON:

Diameter, d= 18 in

So,

Circumference = pi×d

= 3.14×18 in

= 56.52 in

HOPE IT IS USEFUL

5 0
3 years ago
Is y=-x proportional?
Hunter-Best [27]

Answer:

Yea

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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