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LuckyWell [14K]
3 years ago
8

Which of the following is not an equivalent expression to -12 - 7x?

Mathematics
2 answers:
Georgia [21]3 years ago
8 0

-7x + 12 is not an equiv. expression because one of the - signs in the original expression has been changed to +.

Anna35 [415]3 years ago
7 0

Answer:

A. -7x+12

Step-by-step explanation:

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What is the answer to 2-2×3+3
andreyandreev [35.5K]
2 - 2 x 3 + 3
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(10) Sets P,Q,R and S are given by P-{a,b}, Q-{a,0}, R={0} and S={p,0} Complete the following: PU Q QnR Pn S P Q Power set of Q
wlad13 [49]

Answer:

PUQ= {a, b,0}

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4 0
3 years ago
The 90% confidence interval for the mean one-way commuting time in New York City is
Zinaida [17]

Answer:

95% provides more information

Step-by-step explanation:

The confidence interval is obtained by using the relation :

Xbar ± Zcritical * σ/√n

(Xbar - (Zcritical * σ/√n)) = 5.22 - - - (1)

(Xbar + (Zcritical * σ/√n)) = 5.98 - - (2)

Adding (1) and (2)

2xbar = 5.22 + 5.98

2xbar = 11.2

xbar = 11.2 / 2 = 5.6

Margin of Error :

Xbar - lower C.I = Zcritical * σ/√n

Zcritical at 90% = 1.645

5.6 - 5.22 = 1.645 * (σ/√n)

0.38 = 1.645 * (σ/√n)

(σ/√n) = 0.38 / 1.645 = 0.231

Therefore, using the se parameters to construct at 95%

Zcritical at 95% = 1.96

Margin of Error = Zcritical * σ/√n

Margin of Error = 1.96 * 0.231 = 0.45276

C.I = xbar ± margin of error

C. I = 5.6 ± 0.45276

C.I = (5.6 - 0.45276) ; (5.6 + 0.45276)

C. I = (5.147 ; 6.053)

Hence, 95% confidence interval provides more information as it is wider.

3 0
3 years ago
What does 20+y= hurry please
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Answer:

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Step-by-step explanation:

20+y=y+20

8 0
3 years ago
What is the geometric mean of 3 and 15​?
7nadin3 [17]
√(3*15)=√45=√[5*3^(2)]=3√5
3 0
3 years ago
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