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3 years ago

5

Find QR: 3x+22=10x-41

1 answer:

Tatiana [17]3 years ago

6 0

Answer:

x=9

Step-by-step explanation:

subtract 22 from both sides, simplify 3x = 10x-63, subtract 10x from both sides of the equation, simplify -7x = -63, divide both sides of the equation by the same factor -7x/-7 = -63/-7, then simplify

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Change 2x+y=-4 into slope-intercept form with steps

nikitadnepr [17]

Answer : y = -2x - 4

All you have to do is put y on one side and the 2x on the other side, just make sure to make it negative since you are subtracting it to go on the other side

8 0

3 years ago

HOTS Question:<br>Solve: 2xy /x+y = 3/2, x+y≠0 and xy / 2x-y = -3 / 10, 2x-y≠0

andreyandreev [35.5K]

$x = \frac{1}{2}$ and $y = - \frac{3}{2}$

Step-by-step explanation:

$\frac{2x}{x + y} = \frac{3}{2}$

$= > \frac{x + y}{xy} = \frac{4}{3}$

$= > \frac{1}{x} + \frac{1}{y} = \frac{4}{3}$ ---- Eq. 1

Then,

$\frac{xy}{2x - y} = - \frac{3}{10}$

$= > \frac{2x - y}{xy} = - \frac{10}{3}$

$= > - \frac{1}{x} + \frac{2}{y} = - \frac{10}{3}$ -- Eq. 2

Let

$\frac{1}{x} = u$ and

$\frac{1}{y} = v$ .

Then, from Eq. 1 & 2, we get:

$u + v = \frac{4}{3}$ and

$- u + 2v = - \frac{10}{3}$

$= > 3u + 3v = 4$ and

$- 3u + 6v= - 10$

By adding, we get,

$9v = - 6$

$= > v = \frac{ - 6}{9}$

$= > v = - \frac{2}{3}$

Substituting "y" got above in Eq.1, we get,

$\frac{1}{x} - \frac{2}{3} = \frac{4}{3}$

$= > \frac{1}{x} = \frac{6}{3} = 2$

$= > x = 2$

Hence,

$x = \frac{1}{2}$

$= > y = - \frac{3}{2}$

5 0

3 years ago

Solve for x. 3x = 2 5 A) 1 4 B) 2 15 C) 5 6 Eliminate D) 6 5

maria [59]

Answer:

B) 2/15

Step-by-step explanation:

3x = 2/5

x = 2/5 : 3 = 2/5 * 1/3 = 2/15

6 0

4 years ago

Evaluate the expression for the given value of x.<br><br><br> −2x + 3 for x = 1

Brut [27]

Answer:

2

Step-by-step explanation:

So in the equation -2x + 3 if we substitute the x for 1 in parenthesis it will look like this.

-2(1) + 3

So -2*1 is -1.

So if we add -1 and 3 we get <em><u>2</u></em>.

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3 years ago

Find the midpoint of the line segment with end points at (-6, 2) and (3, 8)

suter [353]

-3/2,5 are the two midpoints of (-6,2) and (3,8)

4 0

4 years ago

Read 2 more answers