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Taya2010 [7]
3 years ago
6

What is the median of the numbers 51 38 48 36 39 40 39 47

Mathematics
1 answer:
Lelu [443]3 years ago
5 0

Answer:

39.5

Step-by-step explanation:

We put the numbers in order least to greatest and pick the middle one because that number is the median:

36, 38, 39, 39, 40, 47, 48, 51

Since 39 and 40 are tied for the median we go in between those two numbers, 39.5.  The answer is 39.5.

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The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain? {5, 8} {-5, -8} {3, 8} {4, 7} {4, 8}
Savatey [412]
The range is the ouutput from inputing the input
basically
25=k²+2k+1 and 64=k²+2k+1
the values that satisfy both equations (not at the same tim) are the valuess that are the domain
solve each
25=k²+2k+1
minus 25 both sides (or recognize the perfect square trinomial, but anyway)
0=k²+2k-24
factor
0=(k+6)(k-4)
set to zero
k+6=0
k=-6
k-4=0
k=4
k=-6 or 4

64=k²+2k+1
minus 64 both sides
0=k²+2k-63
facor
0=(k-7)(k+9)
set to zer
k-7=0
k=7
k+9=0
k=-9
k=-9 or 7



so the domain has the numbers
-9,-6,4,7
it seems we only want the positive square roots so
answer is {4,7} is the domain
3 0
3 years ago
Whatis the probability that the card drawn is grey, given that an odd-numbered card is drawn?
Eduardwww [97]
Probability is 1/3! this is because the out off the odd numbers, only one is grey.
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3 years ago
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)The scatter plot shows the number of fliers mailed out in a month (in thousands) and the number of new customers small business
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Solve (2^2x+1)-9(2^x)+4=0​
BartSMP [9]
  • Answer:

<em> x₁ = - 1</em>

<em> x₂ = 2</em>

  • Step-by-step explanation:

<em>2²ˣ⁺¹ - 9ₓ2ˣ + 4 = 0</em>

<em>2²ˣₓ2 - 9ₓ2ˣ + 4 = 0</em>

<em>2ˣ = n</em>

<em>2n² - 9n + 4 = 0</em>

<em>2n² - n - 8n + 4 = 0</em>

<em>n(2n - 1) - 4(2n - 1) = 0</em>

<em>(2n - 1)(n -4) = 0</em>

<em>2n - 1 = 0 => n₁ = 1/2</em>

<em>n - 4 = 0 => n₂ = 4</em>

<em />

<em>2ˣ = 1/2 => 2ˣ = 2⁻¹ => x₁ = - 1</em>

<em>2ˣ = 4 => 2ˣ = 2² => x₂ = 2</em>

8 0
3 years ago
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