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Vesna [10]
3 years ago
15

Which equation(s) represents proportional relationship(s) with a constant of proportionality equal to 2?

Mathematics
1 answer:
In-s [12.5K]3 years ago
6 0

Answer:

y=2x

Step-by-step explanation:

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Which answer choice is equivalent to the expression 3x-1/2?
alex41 [277]

You can substitute a number in for x and compare the answer choices (not the most efficient way but it's how I would do it). Let's just say x = 5. Then the expression would equal 0.25819889. Substitute 5 in for x is the answer choices and see which one is the same.

A) simplified is 0.004 repeating

B) simplified is 0.25819889

C) simplified is 0.12

D) simplified is 1.341640786

We can see that B is the right answer

6 0
3 years ago
If m = (3x-1) and n = (3x+1),sjow that x² = mn+1 by 9​
aalyn [17]

Step-by-step explanation:

{x}^{2}  =  \frac{mn + 1}{9}

(3x - 1)(3x + 1)

9 {x}^{2}  - 1

{x}^{2}  =  \frac{9 {x}^{2 } - 1 + 1 } {9}

{x}^{2}  =  \frac{9 {x}^{2} }{9}

{x}^{2}  =  {x}^{2}

So this identity is true.

5 0
3 years ago
What is the area of the triangle? ​
vladimir2022 [97]

Answer:

10

Step-by-step explanation:

1/2×(-2-(-7))×(6-(-4))

5 0
3 years ago
The function p(x) = _2(x _ 9)2 + 100 is used to determine the profit on T-shirts sold for x dollars. What would the profit from
Valentin [98]

Answer:

Option (b) is correct.

The profit  from sales if the price of the T-shirts were $15 a pieces is $28.

Step-by-step explanation:

Given : The function p(x)=-2(x-9)^2+100 is used to determine the profit on T-shirts sold for x dollars.

We have to find the profit from sales if the price of the T-shirts were $15 a pieces.

Consider the given profit function  p(x)=-2(x-9)^2+100

For the profit, if the price of a t-shirt is $ 15

Put x = 15, we have,

p(15)=-2(15-9)^2+100

Simplify, we have,

p(15)=-2(6)^2+100=-2\cdot 36+100

Also,  p(15)=-72+100=28

Thus, we get,  The profit  from sales if the price of the T-shirts were $15 a pieces is $28.

5 0
3 years ago
Read 2 more answers
I need to complete the equation of the line through (3 -1) and (4 7). I am really stumped on this topic, please explain the proc
Nana76 [90]

Assuming you want the equation in slope intercept form, you first need to use slope formula to find the slope.

\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Plug in the coordinates that you have, (3,-1) and (4,7), for the x and y values respectively.

\frac{-1-7}{3-4}

Which reduces to 8/1=8.

The slope of your equation is 8.

Slope intercept form is: y=mx+b. m is your slope and b is your y-intercept, x and y stay unchanged.

Plug the slope in:

y=8x+b.

Now, you can plug one of the sets of coordinates into the x and y of the equation to find b. I'm using (3,-1).

-1=8(3)+b

-1=24+b

Subtract 24 from both sides.

-25=b

Now plug this into the equation!

y=8x-25 is your final equation.

I hope this helps :)

6 0
3 years ago
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