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liq [111]
3 years ago
14

PLEASE HELP

Mathematics
2 answers:
12345 [234]3 years ago
5 0

the answer is a 0.7

hope this helps :)

katovenus [111]3 years ago
4 0
First, to solve for the mean absolute deviation, we need the mean of the data set. So for this case, it's (1+1+2+2+2+4)/6 = 2. To get the mean absolut deviation, we'll need the average of the difference between each data and the mean. That is [ (2 - 1) + (2 -1) + (2 - 2) + (2 - 2) + (2 - 2) + (4 - 2) ]/6 = 4/6 = 0.67. From the choices, the closest is 0.7. So the answer must be A<span>.</span>
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The straight line 2x + 3y = 7 meets the curve
NISA [10]

Step-by-step explanation:

xy + 10 = 0. => y = -10/x.

2x + 3y = 7. => 3y = -2x + 7, y = -2/3 x + 7/3.

When -10/x = -2/3 x + 7/3,

-10 = -2/3 x² + 7/3 x, 2/3 x² - 7/3 x - 10 = 0.

=> 2x² - 7x - 30 = 0

=> (2x + 5)(x - 6) = 0

=> x = -2.5 or x = 6.

dy/dx = d/dx [-10/x] = 10/x².

When x = -2.5, dy/dx = 10 / (-2.5)² = 1.6.

When x = 6, dy/dx = 10 / (6)² = 5/18.

Hence the gradients at the points are 1.6 and 5/18.

5 0
3 years ago
How can you determine which property of equality is needed to isolate a variable and solve a given equation? Explain. A. Use inv
mamaluj [8]

Answer:

A. Use inverse relationships to "undo" the operation.

Step-by-step explanation:

I took the , and this was the correct answer. :)

6 0
2 years ago
Read 2 more answers
Bob discovers a box with 30 identical, used, rechargeable batteries in his attic.
monitta

Answer:

a) All of them are out of charge = 9.31x10⁻¹⁰

b) 20% of them are out of charge = 5.529x10⁻⁴

Step-by-step explanation:

This problem can be modeled as a binomial distribution since

There are n repeated trials and all of them are independent of each other.

There are only two possibilities: battery is out of charge and battery is not out of charge.

The probability of success does not change with trial to trial.

Since it is given that it is equally likely for the battery to be out of charge or not out of charge so probability of success is 50% or 0.50

P = 0.50

1 - P = 0.50

a) All of them are out of charge?

Probability = nCx * P^x * (1 - P)^n-x

Probability = ₃₀C₃₀(0.50)³⁰(0.50)⁰

Probability = 9.31x10⁻¹⁰

b) 20% of them are out of charge?

0.20*30 = 6 batteries are out of charge

Probability =₃₀C₆(0.50)²⁴(0.50)⁶

Probability = 5.529x10⁻⁴

5 0
3 years ago
Ada is showing her work in simplifying (5.9 - 1.8) - 6.2 + 4.1. In which step did Ada make an error? (5 points)
soldier1979 [14.2K]

Answer:

Step 4 is where she made the error.

Step-by-step explanation:

This step is actually known as the commutative property. That property states that we can change the order of numbers as long as we keep the signs and it maintains it's validity.

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3 years ago
How many times can 1021 go into 6
mina [271]

Answer:

uh i really wanna help but maybe dividing would help :)

Step-by-step explanation:

8 0
2 years ago
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