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BARSIC [14]
3 years ago
7

What is the value of 7x^2 + 2x when x=3

Mathematics
1 answer:
Amanda [17]3 years ago
8 0
The answer is 69 because when you substitute 3 for x, and do the math, you get 69.
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The average time it takes for a person to experience pain relief from aspirin is 25 minutes. A new ingredient is added to help s
liberstina [14]

Answer:

-2.23 ; 0.012874

Step-by-step explanation:

Given that :

Population mean (μ) = 25 minutes

Same mean (x) = 24min 12 seconds = 24.2 minutes

Standard deviation σ = 3

Sample size (n) = 70

Test statistic :

Using the relation :

Tstatistic = (x - m) / σ/sqrt(n)

Tstatistic = (24.2 - 25) / (3/sqrt(70)

Tstatistic = - 0.8 / 0.3585685

Tstatistic = - 2.2310939

= - 2.23

The P value can be obtained using a. P value Calculator :

P at α = 95% and test statistic = - 2.23

Hence, p = 0.012874 using calculator

4 0
3 years ago
How do I solve (b) (c) and (d)
padilas [110]

Answer:

Step-by-step explanation:

answer (B)

6 0
3 years ago
The post office is now calculating the volume of packages to determine the shipping cost. If a box measure 8 1/2 inches long, 5
sladkih [1.3K]
Answer:
volume of box = 312.375 in²

Explanation:
The volume of a rectangular box can be measured as follows:
volume = length* width * height

From the givens we have:
length = 8.5 in
width = 5.25 in
height = 7 in

Substitute with the givens in the above equation to get the volume as follows:
volume = length * width * height
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volume = 312.375 in²

Hope this helps :)
3 0
3 years ago
PQRS is a quadilateral in which <PQR=74°;
8090 [49]
Hey bro not the best but remember too use PEMDAS
8 0
2 years ago
An item is priced at $13.24. If the sales tax is 5%, what does the item cost including sales tax?
cestrela7 [59]
B would be correct cause 5 percent would be .66
8 0
4 years ago
Read 2 more answers
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