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Leona [35]
3 years ago
9

If 3x + 6 = 213x plus 6 equals 21, what does x + 2x plus 2 equal?

Mathematics
2 answers:
Ludmilka [50]3 years ago
5 0

Answer:

17

Step-by-step explanation:

PLS GIVE BRAINLIEST

never [62]3 years ago
4 0

Repost your question. Separate your words, variables and numbers correctly. Otherwise, it makes no sense.

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What are the roots of the polynomial equation x3-7x=6x-12?
Ilia_Sergeevich [38]
This is not a polynomial equation unless one of those is squared.  As it stands x=-.833.  If you can tell me which is squared I can help solve the polynomial.

Ok, that is usually notated as x^3 to be clear.   I'll solve it now.

x^3-13x-12=0

Then use factor theorum to solve x^3-13x-12/x+1 =0
So you get one solution of x+1=0
x=-1

Then you have x^2-x-12 now you complete the square.

Take half of the x-term coefficient and square it. Add this value to both sides. In this example we have:

The x-term coefficient = −1

The half of the x-term coefficient = −1/2

After squaring we have (−1/2)2=1/4

When we add 1/4 to both sides we have:

x2−x+1/4=12+1/4

STEP 3: Simplify right side

x2−x+1/4=49/4

STEP 4: Write the perfect square on the left.

<span>(x−1/2)2=<span>49/4
</span></span>

STEP 5: Take the square root of both sides.

x−1/2=±√49/4

STEP 6: Solve for x.

<span>x=1/2±</span>√49/4

that is,

<span>x1=−3</span>

<span>x2=4</span>

<span>and the one from before </span>

<span>x=-1</span>

7 0
3 years ago
Read 2 more answers
What value of x makes this equation true? 6x/-4=6(-1/2)<br> a) -2<br> b)2<br> c)3<br> d)-3
Yuri [45]
6x/-4 = 6(-1/2)
6x/-4 = - 3...multiply by -4
6x = -3 * -4
6x = 12
x = 2


7 0
3 years ago
the slope of the line is below 2. use the coordinates of the labeled point to find a point-slope equation of the line.
Allushta [10]

Answer:

C

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Here m = 2 and (a, b) = (1, 9) , thus

y - 9 = 2(x - 1) → C

3 0
3 years ago
Jennifer has a map of Yellowstone National Park. The scale on this map is 1cm = 9.8 miles. Jennifer measured some distances on t
ankoles [38]

Answer: 24.5

Step-by-step explanation: 1cm/9.8 mi

                                             2.5cm/? 2.5 *9.8= 24.5

6 0
2 years ago
Read 2 more answers
PLSSSSSSS HELPPPPPppppp
icang [17]

Answer:

20 units

Step-by-step explanation:

The polygon has 4 vertices as indicated by the 4 coordinate points given.

(3, 1) and (8, 1) is a horizontal side of length 8 - 3 = 5

Similarly

(3, 6) and (8, 6) is the opposite horizontal side of length 8 - 3 = 5

Points (3, 1) and (3, 6) is a vertical side of length 6 - 1 = 5

(8, 1) and (8, 6) is the opposite side of length 6 - 1 = 5

The polygon is therefore a square of side 5 units.

Perimeter = 4 × 5 = 20 units

5 0
3 years ago
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