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jekas [21]
2 years ago
9

If a sample proportion is 0.65, which range of possible values best describes

Mathematics
1 answer:
Pani-rosa [81]2 years ago
6 0

Answer: (0.6, 0.7)

Step-by-step explanation: Just did it on A.P.E.X

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The sum of the first term of an ap is 240 and the sum of the next 4 term is 220 find the first term of the ap
Sindrei [870]

Answer:

The common difference is -5/4

T(n) = T(0)  - 5n/4,

where T(0) can be any number. d = -5/4

Assuming T(0) = 0, then first term

T(1) = 0 -5/4 = -5/4

Step-by-step explanation:

T(n) = T(0) + n*d

Let

S1 = T(x) + T(x+1) + T(x+2) + T(x+3) = 4*T(0) + (x + x+1 + x+2 + x+3)d = 240

S2 = T(x+4) + T(x+5) + T(x+6) + T(x+7) = 4*T(0) + (x+5 + x+6 + x+7 + x+8)d = 220

S2 - S1

= 4*T(0) + (x+5 + x+6 + x+7 + x+8)d - (4*T(0) + (x+1 + x+2 + x+3 + x+4)d)

= (5+6+7+8 - 1 -2-3-4)d

= 4(4)d

= 16d

Since S2=220,  S1 = 240

220-240 = 16d

d = -20/16 = -5/4

Since T(0) has not been defined, it could be any number.

7 0
3 years ago
Area is 96 length is 4x+8 width is x find x
dimulka [17.4K]

Answer

Step-by-step explanation:

The area would be length times width. x(4x+8) =96

4x^2+8x = 96

4x^2+8x-96=0. We need to factor.

It would be factored to (4x-16)(x+6) = 0

x would be -6 (x+6=0)

or x would be 4 (4x-16=0)

Why would the width be negative?!? So the answer is 4

4 0
2 years ago
Help me please,Thanks
crimeas [40]
I think its 36, i'm not sure.
8 0
3 years ago
Which table has a constant of proportionality between y and x of 4
Agata [3.3K]
I think the answer to this is 4 I think
8 0
2 years ago
Solve the equation y=7x-5
shtirl [24]
7x - 5 = 0
7x = 5
x = 5/7

--------------------------
3 0
2 years ago
Read 2 more answers
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