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saul85 [17]
3 years ago
8

Which equation has a constant of proportionality equal to 2?

Mathematics
1 answer:
NemiM [27]3 years ago
5 0

Answer:

A

Step-by-step explanation:

The equation y=kx describes the proportional relationship between variables x and y. In this equation, k is the coefficient of proportionality.

Consider all options:

A. For the equation

y=\dfrac{10}{5}x,

the coefficient of proportionality is

k=\dfrac{10}{5}=2

B. For the equation

y=\dfrac{2}{2}x,

the coefficient of proportionality is

k=\dfrac{2}{2}=1

C. For the equation

y=\dfrac{2}{4}x,

the coefficient of proportionality is

k=\dfrac{2}{4}=\dfrac{1}{2}

D. For the equation

y=\dfrac{22}{22}x,

the coefficient of proportionality is

k=\dfrac{22}{22}=1

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tensa zangetsu [6.8K]

Answer:

For the first one, you get x<7.

For the second one, you get x >_ 11

Step-by-step explanation:

For the first one: -2x - 2 > -16

Step 1. Add 2 to both sides.

-2x - 2 +2 > -16 + 2

-2x > -14

Step 2. Divide both sides by -2 and switch the sign

-2x/-2 > -14/-2

x < 7

For the second one: 2x - 1 >_ 21

Step 1: Add 1 to both sides

2x -1 +1 >_ 21 + 1

2x >_ 22

Step 2: Divide both sides by 2

2x/2 >_ 22/2

x >_ 11

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3 years ago
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Step-by-step explanation:


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Find two numbers such that one number is 3 less than twice as big as the other number and the two numbers sum to 21.
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Answer:

The two numbers are:

8 and 13

Step-by-step explanation:

a = 2b - 3       Eq. 1

a + b = 21        Eq. 2

Replacing Eq. 1 in Eq. 2:

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