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Nata [24]
2 years ago
14

You go down 8 floors in an elevator. Your friend goes up5 floors in an elevator. Write each amount as an integer.

Mathematics
1 answer:
Elina [12.6K]2 years ago
5 0

Answer:

You: -8

Friend: 5

Step-by-step explanation:

I'm pretty sure this is right

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Find the values of the variables.
iris [78.8K]

Answer:

x=-1/2

Step-by-step explanation:

2x+2=4x+3

-1=2x

x=-1/2

3 0
2 years ago
Does the equation y = x represent a function? Explain why or why not.
Sphinxa [80]

Answer:

It represents a function because it consists of x-intercept and y-intercept hence can be plotted.

3 0
2 years ago
What is the equivalent of 4 meters?
lesya692 [45]
The equivalent of 4 meters is 4.374 yards
6 0
3 years ago
The volume (in cubic inches) of a shipping box is modeled by V =2x³ -19x² +39x, where x is the length (in inches). Determine the
yawa3891 [41]

Answer:

The values of x for which the model is 0 ≤ x ≤ 3

Step-by-step explanation:

The given function for the volume of the shipping box is given as follows;

V = 2·x³ - 19·x² + 39·x

The function will make sense when V ≥ 0, which is given as follows

When V = 0, x = 0

Which gives;

0 = 2·x³ - 19·x² + 39·x

0 = 2·x² - 19·x + 39

0 = x² - 9.5·x + 19.5

From an hint obtained by plotting the function, we have;

0 = (x - 3)·(x - 6.5)

We check for the local maximum as follows;

dV/dx = d(2·x³ - 19·x² + 39·x)/dx = 0

6·x² - 38·x + 39 = 0

x² - 19/3·x + 6.5 = 0

x = (19/3 ±√((19/3)² - 4 × 1 × 6.5))/2

∴ x = 1.288, or 5.045

At x = 1.288, we have;

V = 2·1.288³ - 19·1.288² + 39·1.288 ≈ 22.99

V ≈ 22.99 in.³

When x = 5.045, we have;

V = 2·5.045³ - 19·5.045² + 39·5.045≈ -30.023

Therefore;

V > 0 for 0 < x < 3 and V < 0 for 3 < x < 6.5

The values of x for which the model makes sense and V ≥ 0 is 0 ≤ x ≤ 3.

8 0
3 years ago
Mike has 4 black marbles tom has 2 black marbles how many black marbles do they have in all​
kompoz [17]

Answer:

6

Step-by-step explanation:

4+2

4 0
3 years ago
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