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Vaselesa [24]
2 years ago
8

Choose two number sentences below that equal 39:

Mathematics
1 answer:
Vanyuwa [196]2 years ago
7 0
A, because 71-32 is equal to 39
C, because 85-46 is also equal to 39
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a third grader has a goal of solving 100 math facts in 5 minutes (or 300 seconds). how many seconds can he spend on each math fa
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1 fact per 3 seconds because you divide 300 by 100

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Identify the leading coefficient in the following polynomial:<br> – 5x² + 3x - 7
insens350 [35]

Answer:

-5

Step-by-step explanation:

The leading coefficient means the thing you're multiplying your highest power by. Here, your highest power of x is x^2, and that term's coeff. is -5, so the leading coefficient is -5.

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Help please really need it fast :)
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.4 x .9

Step-by-step explanation:

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HURRY HELP ME. Which statement about numbers is true? All whole numbers are rational numbersS All rational numbers are integers.
iris [78.8K]

Answer:

all rational numbers are intergers

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4 0
3 years ago
The company’s cost of manufacturing a single 1-inch binder is $0.25. What is the expected profit (in dollars) that the company w
pav-90 [236]

It should be noted that the mean and the standard deviation of the data given in will be 4.26 and 1.1011 respectively.

<h3>How to solve the mean.</h3>

From the complete information, the mean will be calculated as:

= (0.02 × 1) + (0.09 × 2) + (0.12 × 3) + (0.15 × 4) + (0.62 × 5)

E(X) = 4.26

The standard deviation will be calculated thus:

E(X²) = (0.02 × 1²) + (0.09 × 2²) + (0.12 × 3²) + (0.15 × 4²) + (0.62 × 5²)

E(X²) = 19.36

The standard deviation will then be the difference between the square root of 19.36 and 4.26². This will be 1.1011.

The expected profit of the company will be:

= 0.75 × E(X)

= 0.75 × 4.26

= $3.20

The mean of the total number of binders purchased will be:

= 4.26 + 2.74 = 7

The standard deviation will be 1.6658.

Lastly, the total expected profit will be:

= 0.75E(X) + 1.45E(Y)

= 0.75(4.26) + 1.45(2.74)

= 3.195 + 3.973

= 71.68

Learn more about standard deviation on:

brainly.com/question/24298037

4 0
2 years ago
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