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wlad13 [49]
3 years ago
7

If a population consisted 7000000 people , a sample of the population could consist of which of these numbers

Mathematics
1 answer:
timofeeve [1]3 years ago
7 0

Step-by-step explanation:

of all the peoples sscccudjdjdkdjjddjddjdjfjfjfjfjd

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Could someone please answer question b) ii) ?<br> The question is on the attached image.
mel-nik [20]

Answer:

b) i) Curve A

ii) - 1.75

iii) x = 1 - √5  or x = 1 + √5

Step-by-step explanation:

b) i) We are given a function y = x² - 2x - 3 and the graph of this function is also shown in the side diagram.

The equation can be rearranged to y = (x - 1)² - 4

⇒ (x - 1)² = y + 4

Therefore, this is an equation of a parabola having the vertex at (1,-4) point and its axis is parallel to the positive y-axis.

So, the curve A represents the equation given. (Answer)

ii) Now, at x = 2.5, f(x) = 2.5² - 2 × 2.5 - 3 = - 1.75 (Answer)

iii) When y = 1, then x² -2x - 3 = 1

⇒ x² - 2x - 4 = 0

⇒ (x - 1)² - 5 = 0

⇒ (x - 1)² - (√5)² = 0

⇒ (x - 1 + √5)(x - 1 - √5) = 0

⇒ x = 1 - √5  or x = 1 + √5 (Answer)

3 0
3 years ago
Carmen has a rope 54 feet long. She wants to cut it into 6-foot lengths to make jump ropes for the members of the jump roping te
Ilia_Sergeevich [38]
54 divided by 6 is 9. she can 9 times
7 0
3 years ago
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What is the value of x in this figure?
arsen [322]

Answer: The value of x in this figure is 43

Step-by-step explanation:

have a nice day !!

6 0
3 years ago
Read 2 more answers
Simplify 2x^2 + 16x +30/ 5x^2 +13x -6
german
<span> (-2x - 1) • (5x + 4)</span>
7 0
2 years ago
A 16. in piece of string is 40....
andreyandreev [35.5K]

Answer:

106.68 cm long

Step-by-step explanation:

Let's use a ratio:

inch : centimeters

 16   :     40.64

  1    :      2.54

 42  :    106.68

The ribbon would be 106.68 cm long.

3 0
3 years ago
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