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Vikki [24]
2 years ago
12

What it 40x + 24? I can't figure this out.

Mathematics
1 answer:
Dmitrij [34]2 years ago
7 0
8(5x+3)


If you miltiplied 8 x 5x it will give you 40 x

And 8 x 3 is 24
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A car traveling at a certain speed will travel 76 feet per second. How many miles will the car travel in 3.1 hours if it maintai
murzikaleks [220]
\sf  \frac{76~ feet}{1~second} \times  \frac{1~mile}{5280~feet} \times  \frac{3600~seconds}{1~hour} =  \frac{51.82~miles}{hour}

51.82 miles in one hour, so 51.28 x 3 = <span>155.46 miles in 3 hours.

Your answer is </span><span>155.46 miles in 3 hours.</span>
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3 years ago
Help !!!
ivann1987 [24]
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2 years ago
5 squirrels were found to have an average weight of 8.9 ounces with a sample standard deviation is 0.9. Find the 95% confidence
stira [4]

Answer: ( 8.11 , 9.69)

the 95% confidence interval of the true mean weight

= ( 8.11 , 9.69)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 8.9

Standard deviation r = 0.9

Number of samples n = 5

Confidence interval = 95%

z(at 95% confidence) = 1.96

Substituting the values we have;

8.9+/-1.96(0.9/√5)

8.9+/-1.96(0.4025)

8.9+/- 0.79

= ( 8.11 , 9.69)

Therefore at 95% confidence interval (a,b) = ( 8.11 , 9.69)

7 0
3 years ago
On a certain day, the temperature changed at a rate of 3°F per hour. How long did it take for the change in temperature to be -3
mamaluj [8]

Answer:

I think 11 hours.

Step-by-step explanation:

If I know starting temp such as 0 degrees then I can say that it would take 11 hours as 11*3 = 33. If it is 3 degrees, then it would 3*12 = 36 degrees.

7 0
3 years ago
How many terms are in the expression 6x2-2x-14y+3x
Schach [20]
4 terms.
6x2, 2x, 14y, and 3x
3 0
3 years ago
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