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My name is Ann [436]

3 years ago

6

Write the explicit rule for the arithmetic sequence -10, -3, 4, 11,...

1 answer:

Bogdan [553]3 years ago

6 0

a

0

=

4

a

i

=

a

i

−

1

+

7

XXXX

possibly with the restriction 1<=i<=4 if this is not intended to be a continuous sequence

Explanation:

This is a simple arithmetic sequence with a difference of

7

between ascending sequence terms.

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1 Which size Yogli Mogli which yogurt size gives you the best price per ounce?

zaharov [31]

Super size gives you the best price per ounce

8 0

3 years ago

Round the number to the thousandths place. <br> 39,015.892491

RSB [31]

39,015.892491 rounded is 39,000
Hope I helped :))

4 0

4 years ago

the second term in a geometric sequence is 12. the fourth term in the same sequencce is 4/3. what is the common ratio in this se

nordsb [41]

Geo is
an=a1r^(n-1)

2nd term is 12
4th term is 4/3

a2=a1r^(2-1)=12
a2=a1r=12

a4=a1r^(4-1)=4/3
a4=a1r^3=4/3

we have
a1r=12 and a1r^3=4/3
(a1r^3)/(a1r)=r^2=(4/3)/12=1/9

1/9=r^2
sqrt oth sides
1/3=r

the common ratio is 1/3

5 0

4 years ago

(7q+7)+(9q+1)<br> please <br> help

BigorU [14]

Answer:

16q + 8

Step-by-step explanation:

(7q+7)+(9q+1)

7q + 7 + 9q + 1

16q + 8

8 0

3 years ago

Read 2 more answers

Noise levels at 3 airports were measured in decibels yielding the following data:

Shalnov [3]

Answer:

a) The 90% confidence interval for the mean noise level at such locations

(112.46 , 163.54)

b) The critical value that should be used in constructing the confidence interval

Z₀.₁₀ = 1.645

Step-by-step explanation:

<u><em>Step(i)</em></u> :-

Noise levels at 3 airports were measured in decibels yielding the following data

108 146 160

Mean of given data

$x^{-} = \frac{108+146+160}{3} = 138$

x : 108 146 160

x-x⁻ : -30 8 22

(x-x⁻ )² : 900 64 484

Variance σ ² = ∑(x-x⁻ )²/ n-1

= $\frac{900+64+484}{3-1}= 724$

Standard deviation

σ = √724 = 26.90

<u><em>Step(ii):</em></u>-

The 90% confidence interval for the mean noise level at such locations

$(x^{-} - Z_{0.90} \frac{S.D}{\sqrt{n} } , (x^{-} + Z_{0.90} \frac{S.D}{\sqrt{n} } )$

The critical value that should be used in constructing the confidence interval

Z₀.₁₀ = 1.645

$(138 - 1.645 \frac{26.90}{\sqrt{3} } , (138 + 1.645 \frac{26.90}{\sqrt{3} } )$

( 138 - 25.54 , 138 + 25.54 )

(112.46 , 163.54)

4 0

3 years ago