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3 years ago

Find the output for each input of y = 2x – 1.

Mathematics

1 answer:

Jlenok [28]3 years ago

5 0

1) False. You'd substitute -1 in for x, not y.
2) The scale factor is 1ft=14ft so true.
3) The first is a direct variation since y=6x is true.
4)The airplane would be 132ft in real life.
5) None of the functions made sense with the graph. I didnt really know what "thing" you were talking about on that one.

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This graph shows a proportional relationship. What is the constant of proportionality? Enter your answer as a ratio in simplifie

Juli2301 [7.4K]

Answer:

$k=\frac{5}{4}$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem we have that

The line pass through the points

$(0,0)\ and\ (\frac{2}{5},\frac{1}{2})$

Find the value of the constant of proportionality k

For x=2/5, y=1/2

substitute

$k=\frac{y}{x}$

$k=\frac{1}{2}:\frac{2}{5}=\frac{5}{4}$

4 0

2 years ago

3/16=(-5/4)+g please help me

Alla [95]

Answer:

g= $\frac{23}{16}$

Step-by-step explanation:

To begin you want to isolate the g. So you add $\frac{5}{4}$ to both sides. On the left is cancels out so it looks like this:

$\frac{3}{16} +\frac{5}{4} =g$

Next, you find the Least Common Denominator (LCD) which is 16. And since one fraction already has a denominator of 16 you leave it as it is. The other fraction, however, needs to be multiplied (both top and bottom) by 4 to get the denominator (bottom) to 16. So:

$\frac{3}{16} +(\frac{5}{4}*\frac{4}{4} ) =g$

Multiplying it out you get:

$\frac{3}{16} +\frac{20}{16} =g$

Lastly, just add across:

$\frac{3+20}{16} =\frac{23}{16}$

You're done!

$g=\frac{23}{16}$

6 0

3 years ago

Find the value of x to the nearest tenth. tan x°=31

Mekhanik [1.2K]

Try this
x=1.53854944

4 0

3 years ago

Read 2 more answers

Jason runs the same distance each day. In one 7-day period he ran 40 1/4 miles. He knows that there is a proportional relationsh

Harrizon [31]

Jason runs the same distance each day. In one 7-day period he ran 40 1/4 miles. He knows that there is a proportional relationship between n, the number of days, and t, the total distance he runs. Tell whether each statement is True or False.
A. The relationship can be expressed as n=5.25t. True or False
B. The graph of the equation is a straight line through (0,0). True or False
C. The unit rate is 5.75. True or False

The answer is A

7 0

3 years ago

The harmonic mean of two real numbers x and y equals 2xy/(x + y). By computing the harmonic and geometric means of different pai

olasank [31]

Answer:

Conjecture : 2xy / ( x + y ) ≤ √xy

Step-by-step explanation:

Harmonic mean of x and y = 2xy/( x + y )

Formulate a conjecture about their relative sizes

we will achieve this by computing harmonic and geometric means

Geometric mean = √xy

harmonic mean = 2xy/( x + y )

Conjecture : 2xy / ( x + y ) ≤ √xy

attached below is the proof

7 0

2 years ago