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3 years ago

20 points!!!!

Mathematics

2 answers:

valentinak56 [21]3 years ago

8 0

No, because the sample was not random

poizon [28]3 years ago

8 0

A more accurate reason would be that the sample was not big enough to represent the population as a whole, the best answer is "No, because the sample was not random"

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9. A. (3, 6) B. (20, –4) C. (10, –1) D. (–1, 8)

crimeas [40]

Answer:

(10, –1)

Step-by-step explanation:

[1]XXXX3y=−12x+2

[2]XXXXy=−x+9

While it is not technically necessary, I find it easier to clear the fractions before actually beginning; so multiplying [1] by 2

[3]XXXX6y=−x+4

Substituting (from [2]) (−x+9) for y in [3]

[4]XXXX6(−x+9)=−x+4

Simplifying

[5]XXXX−6x+54=−x+4

[6]XXXX5x=50

[7]XXXXx=10

Substituting (from [7]) 10 for x in [2]

[8]XXXXy=−10+9=−1

7 0

3 years ago

A carpenter wishes to make a ladder with 15 cross-pieces.The cross-pieces are to diminish uniformly in Lengths from 67cm at the

FromTheMoon [43]

Answer:

52 cm

Step-by-step explanation:

1st piece (from bottom) = 67 cm

15th piece = 32 cm

a = 67

a₁₅ = a + 14d = 32

14d = 32 - 67

d = -35/14

d =-5/2

d = -2.5

a₇ = a + 6d

= 67 + 6(-2.5)

= 67 - 15

= 52 cm

3 0

3 years ago

A recipe for cake calls for a ratio of 1 cup of sugar for every 2 cups of flour. If Janelle wants

chubhunter [2.5K]

Answer:

3 cups of sugar and 6 cups of sugar

PLZ MARK BRAINLIEST!!!

Step-by-step explanation:

6 0

3 years ago

ILL MARK U BRAINLIEST!!

DerKrebs [107]

Answer:

Step-by-step explanation:

If you look at the frequency, only 1/3 is odd. so I would pick 45. 100/3 is 33.3333, so yeah pretty close. The answer is B. Please mark brainliest if correct.

5 0

3 years ago

Read 2 more answers

What the answer now to the question

Lostsunrise [7]

Step-by-step explanation:

Hello!!!

Given, VXW is a Right angled triangle where WV =4 and XV =5.

now, by taking reference angle as angle W, and using tangent we get;

p=5

b=4

again, 

tan thita =p/b

tan thita = 5/4

so, tan thita =1.25.

now, to find angle W, we should do tan thita inverse;

or, (tan thita)-1= tan thita-1(1.25)

or, (tan thita) -1 =51.3401°.

Now, by rounding off we get,

tan thita (angle W )= 51°.

Hope it helps....

8 0

3 years ago