All categories

3 years ago

Suppose that y varies directly with x and y 12 when x--2. What is x when y -6?

Mathematics

1 answer:

Paraphin [41]3 years ago

8 0

Answer:

The ordered pair that satisfies this problem is (1, -6); x = 1 when y = -6.

Step-by-step explanation:

Please, rewrite your question as follows:

"Suppose that y varies directly with x and y = 12 when x = -2. What is x when

y = -6?" The " = " sign must be included.

The pertinent proportional relationship is y = kx, where k is the constant of proportionality.

We must find k here. Let y = 12 and x = -2. Then 12 = k(-2), or k = -6.

Then the relationship is y = -6x.

Now let y = -6 and find x: -6 = -6x, or x = 1.

The ordered pair that satisfies this problem is (1, -6)

You might be interested in

9 - x2 + 2xy - y2 <br> Factorise

LenaWriter [7]

9-x.2+2xy-y.2

9-2x+2xy-2y

-2x+2xy-2y+9

5 0

3 years ago

Can somebody help me with this question

Alexus [3.1K]

We start with:

y=2x-15
y=5x

Now, we have a perfectly set-up variable we can get rid of: <em>y.</em>

But we need to make either the top or bottom equation negative, so for simplicity, let's make the bottom one negative.

y=2x-15
(-y)=(-5x)

Now simplify.

-3x-15=0

Add 3x on both sides.

3x=15

Divide by 3 on both sides.

x=5

3 0

3 years ago

Read 2 more answers

(x3 + 9x2 + 1)(3x2 + 4x − 4)

kap26 [50]

I don’t understand the question so I answer in two ways

4 0

3 years ago

Someone please answer this and dont just take my points and run without giving me the answer

k0ka [10]

Answer:

So the answer is v=112 sa=165

Step-by-step explanation:

Try using formulas such as 1

4h﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4

and

A=12bh

7 0

3 years ago

Read 2 more answers

Find the midpoint of the segment with the given endpoints (5,-9) and (-2,-2)

QveST [7]

Another way to solve this is to use the Midpoint Formula. The midpoint of a segment joining points $(x_1,y_1)$ and $(x_2,y_2)$ is

$\left(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2} \right)$

So the midpoint of your segment is

$\left(\frac{5+(-2)}{2},\frac{-9+(-2)}{2}\right) = \left(\frac{3}{2},-\frac{11}{2} \right)$

Perhaps it helps to see that the x-coordinate of the midpoint is just the average of the x-coordinates of the points. Ditto for the y-coordinate of the midpoint; just average the y's.

6 0

3 years ago