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Svetach [21]
3 years ago
8

Solve x2 - 10x = -21

Mathematics
2 answers:
ipn [44]3 years ago
8 0

Answer:

add 21 to both sides to get everything on one side

x^2 - 10x + 21 = 0

do factorization, guess and check

(x - 7) (x -3) = 0

x =7, and x =3

Mariana [72]3 years ago
4 0

Answer:

x= 7,3

Step-by-step explanation:

Move all terms to the left side and set equal to 0. Then set each factor = to 0

Hope this helps please make me brainliest!

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Can someone help with this pls it’s due today
KiRa [710]
D, hope this is right! :)
7 0
3 years ago
6y – 5 = –3(2y + 1) please solve
Vinvika [58]

Answer:

y=1/6

Step-by-step explanation:

So we have the equation:

6y-5=-3(2y+1)

First, distribute the right side:

6y-5=-6y-3

Add 6y to both sides. The right cancels:

12y-5=-3

Add 5 to both sides. The left cancels:

12y=2

Divide both sides by 12:

y=2/12

Reduce:

y=1/6

And we're done!

5 0
3 years ago
Read 2 more answers
Answer if you know
zhannawk [14.2K]

Answer:

B. 30

Step-by-step explanation:

The given angles are vertical angles because they are opposite angles created by the same two lines. This means that their value is equal. Let's set up an equation.

85 = 3x - 5

We need to solve for x.

First, combine like terms by adding 5 to both sides.

90 = 3x

Now we want to isolate x by dividing both sides by 3.

x = 30

This is your answer.

Let's check our work by plugging x back into our equation.

85 = 3x - 5

85 = 3(30) - 5

85 = 90 - 5

85 = 85

Your answer is correct.

Hope this helps!

8 0
3 years ago
Read 2 more answers
Create an equation in slope-intercept form from A line that includes the point (6,–7) and has a slope of 2.
Svet_ta [14]

Answer:

<em>Use </em><em>the </em><em>equation</em><em> </em><em>y=</em><em>mx+</em><em>c</em>

<em>the </em><em>slope(</em><em>m)</em><em> </em><em>is </em><em>2</em><em>,</em><em>y </em><em>is </em><em>-7and </em><em>x </em><em>is </em><em>6</em>

<em>therefore</em><em> </em><em>you </em><em>firstly</em><em> </em><em>have </em><em>to </em><em>find </em><em>the </em><em>y </em><em>intercept</em><em> (</em><em>c)</em>

<em>y=</em><em>mx+</em><em>c</em>

<em>-</em><em>7</em><em>=</em><em>2</em><em>(</em><em>6</em><em>)</em><em>+</em><em>c</em>

<em>-</em><em>7</em><em>=</em><em>1</em><em>2</em><em>+</em><em>c</em>

<em>-</em><em>7</em><em>-</em><em>1</em><em>2</em><em>=</em><em>c</em>

<em>-</em><em>1</em><em>9</em><em>=</em><em>c</em>

<em>then </em><em>replace </em><em>the </em><em>gradient</em><em> </em><em>and </em><em>y </em><em>intercept</em><em> </em><em>in </em><em>the </em><em>equation</em>

<em>y=</em><em>mx+</em><em>c</em>

<em>y=</em><em>2</em><em>x</em><em>-</em><em>1</em><em>9</em>

<em>or </em><em>you </em><em>can </em><em>use </em><em>the </em><em>formula</em><em> </em><em>y-y1=</em><em> </em><em>m(</em><em> </em><em>x-x1)</em>

<em>I </em><em>hope </em><em>this </em><em>helps</em>

4 0
3 years ago
What is the slope of the line? PLEASE HURRY
SSSSS [86.1K]

Answer:

Step-by-step explanation:

rise/run. up 3 and over 4. so your slope is 3/4

6 0
3 years ago
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