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Aleks [24]
3 years ago
8

Find the 7th term of the geometric sequence with the given terms. a4 = -8 and a5 = -40; a7 = _______.

Mathematics
1 answer:
Lesechka [4]3 years ago
8 0
The correct answer is - 1000
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A=33

2a2

Step-by-step explanation:

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Which value must be added to the expression x2 + x to make it a perfect-square trinomial?
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X² + x + ...m

x² + x + 1/4
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4 years ago
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Solve the equation. What is the value of x?<br><br> x minus 6.8 = 356.3
koban [17]

Answer:

the answer is 363.1 i used a calculater to find the answer. so 356.3+ 6.8 = 363.1 so x=363.1

Step-by-step explanation:

3 0
3 years ago
A communications company has developed three new designs for a cell phone. To evaluate consumer response, a sample of n = 120 co
defon

Answer:

The answer is "Its results are not consistent with its three designs Yes. Its results show significant differences between both the three designs."

Step-by-step explanation:

Following are the distribution of preference:  

Design 1 =54 \\\\ Design 2=38 \\\\\ Design 3=28 \\\\

Design \ \ \ \ \ \ \ \ \ \ O_i \\ 1 \ \ \ \ \ \  \ \ \ \ \ \ \ \ \ \ \ 54 \\2  \ \ \ \ \ \  \ \ \ \ \ \ \ \ \ \ \ 38\\3 \ \ \ \ \ \  \ \ \ \ \ \ \ \ \ \ \  28 \\Total \ \ \ \ \ \ \ \ \ \ 120

An expected frequency(E_i) has 40 Null hypotheses to take n=120.to each design:  

The effects of the three designs are standardized  

Inaccurate.  

Hypothesis Alternative:  

The effects of the three prototypes are not uniform

Degrees Of freedom =(n-1)=(3-1)=2

H_o, x^2  \ test\  statistic \  \sum_i {\frac{(O_i -E_i)^2}{E_i}} \\

= \frac{(54 -40)^2}{40}+\frac{(38-40)^2}{40} + \frac{(28-40)^2}{40}\\\\=49+0.1+3.6\\\\=8.6

Chi-squared distribution critical value at \alpha = 0.05 (x^2 _{0.052})=5.99  

Since x^2, a value > x^2 -table of \alpha =0.05 =5.99is determined.  

SoH_o is rejected.

4 0
3 years ago
Can you please help​
Xelga [282]

Answer:

8

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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