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2 years ago

For which function is the ordered pair (5,10) not a solution ?

Mathematics

2 answers:

PilotLPTM [1.2K]2 years ago

4 0

Answer:

Step-by-step explanation:

Because

a) 10 = 2(5) = 10

b) 10 = 5 + 5 = 10

c) 10 = 15 -5 = 10

d) 10 = 5 - 5 = 0 the result is not equivalent

lapo4ka [179]2 years ago

3 0

Answer:

the ordered pair (5, 10) is not a solution is

y = x - 5

y = 10 - 5

y = 5

the ordered pair is (5, 5)

the answers are b and d

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Answer:

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Step-by-step explanation:

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3 years ago

With the beam being held still at a height of 40 m, the crane breaks and the beam falls to the ground. Assuming no air resistanc

lapo4ka [179]

What we have so far:
Kinetic energy = 0. The reason behind that is because the beam is not moving at a height of 40m.
Gavity, g = 9.8m/s²
Height = 40m
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Solution:
We will use the equation of Total energy:
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3 years ago

Systems of Equations:

faust18 [17]

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2 years ago

at a maximum speed, an airolane travels 1680 miles against the windin 5 hours. Flying with the wind, the plane can travel the sa

Licemer1 [7]

Answer:

Plane Speed (x) = 378 mph

Step-by-step explanation:

Equation

d = r * t

Givens

With the wind

d = 1680 miles
t = 4 hours
r = x + y

Against the wind

d = 1680
t = 5 hours
r = x - y

Equation

The distances are the same, so you can solve for x in terms of y and then deal with the actual distance.

(x + y)*4 = (x - y)*5 Remove the brackets on both sides

Solution

4x + 4y = 5x - 5y Subtract 4x from both sides
4y = -4x + 5x - 5y Combine
4y = x - 5y Add 5y to both sides
5y + 4y = x
x = 9y

Solution part 2

Now take one of the distance formulas and solve for x first then y.

(x - y)*5 = 1680 Substitute 9y for x
(9y - y)*5 = 1680 Subtract on the left
8y * 5 = 1680 Multiply on the left
40y = 1680 Divide by 40
y = 1680/40
y = 42 That's the speed of the wind.

(x - y)*5 = 1680 Substitute the wind speed for y
(x - 42)*5 = 1680 Divide both sides by 5
(x - 42) = 1680 / 5 Do the division on the right
(x - 42) = 336 Add 42 to both sides.
x = 336 + 42
x = 378 mph Plane's speed

7 0

3 years ago

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son4ous [18]

Answer:

D. 31

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

A previous study indicated that the population standard deviation is 2.8 days.

This means that $\sigma = 2.8$

How large a sample must be selected if the company wants to be 95% confident that the true mean differs from the sample mean by no more than 1 day?

This is n for which M = 1. So

$M = z\frac{\sigma}{\sqrt{n}}$

$1 = 1.96\frac{2.8}{\sqrt{n}}$

$\sqrt{n} = 1.96*2.8$

$(\sqrt{n})^2 = (1.96*2.8)^2$

$n = 30.12$

Rounding up, at least 31 people are needed, and the correct answer is given by option D.

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2 years ago