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3 years ago

Solve for x please help me

Mathematics

1 answer:

stepladder [879]3 years ago

6 0

Answer:

Step-by-step explanation:

By intersecting chords theorem:

$12x = 3(x + 12) \\ \\ 12x = 3x + 36 \\ \\ 12x - 3x = 36 \\ \\ 9x = 36 \\ \\ x = \frac{36}{9} \\ \\ x = 4$

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How do I solve for x? <br><br>2x + 16 = -5(x + 1)

Vanyuwa [196]

P.E.M/D.A/S PEMDAS multiply subtract 2x from each side them its 16 = -7x -5 then add 5 to each side 21= -7x then divide x = -3

4 0

3 years ago

Find the constant $a$ such that\[(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28.\]

Colt1911 [192]

The value of constant a is -5

Further explanation:

We will use the comparison of co-efficient method for finding the value of a

So,

Given

$(x^2 - 3x + 4)(2x^2 +ax + 7)\\= x^2((2x^2 +ax + 7)-3x((2x^2 +ax + 7)+4(2x^2 +ax + 7)\\= 2x^4+ax^3+7x^2-6x^3-3ax^2-21x+8x^2+4ax+28\\Combining\ alike\ terms\\=2x^4+ax^3-6x^3+7x^2-3ax^2+8x^2-21x+4ax+28\\= 2x^4 +(a-6)x^3+(15-3a)x^2-(21-4a)x+28\\$

As it is given that

(x^2 - 3x + 4)(2x^2 +ax + 7) = 2x^4 -11x^3 +30x^2 -41x +28

In this case, co-efficient of variables will be equal, so we can compare the coefficients of x^3, x^2 or x

Comparing coefficient of x^3

$a-6 = -11\\a = -11+6\\a = -5$

So the value of constant a is -5

Keywords: Polynomials, factorization

Learn more about factorization at:

#LearnwithBrainly

4 0

3 years ago

Help me please please

Burka [1]

Answer:

-3/2

Step-by-step explanation:

(y2 -y1)/(x2-x1)

(-2 + 5)/(0 - 2)

7 0

3 years ago

Someone help plz worth 5 point :(

lbvjy [14]

Answer:

86 its the same thing on both sides if im wrong then 90?

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

If bis the unknown number of blankets, which equation best represents the

ddd [48]

Answer:

A. b-9=11

Step-by-step explanation:

I‘m assuming the equation should say b, not 6. She had b blankets, subtracted 9, and was left with 11. b-9=11.

7 0

3 years ago