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3 years ago

Finding domain f(x)=3x+1/x-5

1 answer:

4 0

The function is undefinded if the denominator, x-5, equals 0.
So $x-5 \neq 0 \\ 
x \neq 5$ .
The domain is $x \neq 5$ .
In interval notation, this is (-infinity, 5) u (5, infinity).

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Roland was driving to campus but realized that his car is out of gas. He started driving around Syracuse looking for a gas stati

tester [92]

Answer:

Roland is right, he can be 95% sure that average gas prices have gone up since the same time last year.

Step-by-step explanation:

Let μ be average gas price around Syracuse.

Then hypotheses are:

$H_{0}:$ μ = $2.68

$H_{a}:$ μ > $2.68

Then test statistic can be calculated as:

z= $\frac{X-M}{\frac{s}{\sqrt{N} } }$ where

X is the Roland's calculated average gas prices of 50 gas stations ($2.74)

M is the average average gas prices in the entire of Syracuse last year

s is the standard deviation ($0.11)

N is the sample size(50)

Then z= $\frac{2.74-2.68}{\frac{0.11}{\sqrt{50} } }$ ≈ 3.86

Since P-value of test statistic ≈ 0.00006 <0.05 (significance level), we can reject the null hypothesis.

7 0

4 years ago

Awser those for me please

Rus_ich [418]

1. 46.45
2. 1.92
3. 425.04
4. 69.3
5. I can't see the symbol. Can you type it in the comments?
6. 850
7. 6,960
8. $8
I hope you find this answer the most helpful! :)

8 0

4 years ago

Evaluate the expression for the given variables. <br> 3a - b; a=6, b=9

Ostrovityanka [42]

Answer:

Step-by-step explanation:

8 0

4 years ago

Explain how algebra titles represent like terms and zero pairs

SVETLANKA909090 [29]

Answer:

If there is a negative tile and a positive tile, it creates a zero pair.

Like terms can occur with the same variables (except for terms with exponents)

Step-by-step explanation:

7 0

3 years ago

GUYS I NEED HELP PLSS

vaieri [72.5K]

Answer:

Hlo dear...

Step-by-step explanation:

U didn't said that what help u want????

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3 years ago