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3 years ago

Explain how to use the regression calculator to make a reasonable prediction given a data table.

Mathematics

1 answer:

Vesnalui [34]3 years ago

6 0

Answer:

Step-by-step explanation:

Enter data into the regression calculator.

Determine the regression equation.

Substitute the correct value for x or y into the equation.

Simplify to find the value of the other variable.

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How much water should be mixed with 237 ml of ammonia, whose strength is 100%, in order to create a mixture that is diluted to

Vedmedyk [2.9K]

Let the x ml of water be mixed with 237 ml of ammonia whose strength is 100%, in order to create a mixture of 75% strength.
The equation required to solve this will be:
237/(237+x)=75/100
solving for x we get:
237/(237+x)=3/4
237×4=3(237+x)
948=711+3x
3x+711=948
3x=948-711
3x=237
x=237/3
x=79 ml
therefore the amount of water to be added will be 79 ml

3 0

3 years ago

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Identify the set of numbers that best describes each situation. explain your choice. the height of an airplane as it descends to

meriva

The height of an airplane as it descends to an airport runway is a quantity which has a unit that is usually rounded to a certain terminating degree of accuracy (i.e. 1, 2, ..., n decimal places)

Thus the set of rational numbers best describes the height of an airplane as it descends to an airport runway.

A rational number is a number which can be represented in the form a/b where a and b are integers. It is usually identified by a terminating or a recurring decimal number.

8 0

4 years ago

What is $530,495 rounded to the nearest 1,000 dollars

shepuryov [24]

Answer:530,000

Step-by-step explanation:

First you look at the hundrends if it is greater or the same as 500 than it rounds up if not round down

7 0

3 years ago

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Can someone please help me with this.

allsm [11]

Answer:

Step-by-step explanation:

Given expression is $|8-6 i|$ .

$|8-6 i|$ is a complex expression.

The value of i is –1.

By definition of absolute value, $|a+b i|=\sqrt{a^{2}+b^{2}}$

Now, substitute $|8-6 i|$ in the above formula.

$\Rightarrow|8-6 i|=\sqrt{8^{2}+(-6)^{2}}$ (since i = –1)

$=\sqrt{64+36}$ (since $8^{2}=64$ and $–6^{2}=36$ )

$=\sqrt{100}$ (Square root of 100 is 10)

= 10

Hence, the value of the expression $|8-6 i|$ is 10.

3 0

4 years ago

To open a safe five numbers must be entered on a keypad. The keypad contains numbers 0-9. The numbers have to be entered in a ce

IgorLugansk [536]

Answer:

30.2%

Step-by-step explanation:

a. For each slot there are 10 possible numbers (0-9). Since there are no restrictions, the number in each slot is independent of the other. We can calculate the total number of possibilities using the product rule.

N = 10 × 10 × 10 × 10 × 10 = 10⁵

b. For the first slot, there are 10 possibilities.

For the second slot, we cannot repeat the number that we used in the first slot, so there are 9 possibilities.

For the third slot, we cannot repeat any of the previous numbers, so there are 8 possibilities.

For the fourth slot, we cannot repeat any of the previous numbers, so there are 7 possibilities.

For the fifth slot, we cannot repeat any of the previous numbers, so there are 6 possibilities.

The total number of combinations without any repetitions are:

10 × 9 × 8 × 7 × 6 = 30,240

c. The probability that the safe's five numbers do not repeat is:

P = favorable outcomes / possible outcomes

P = 30,240 / 10⁵ = 30.2%

8 0

3 years ago