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Dominik [7]
4 years ago
7

3(x+2) = 2(2x+7) — solve for x and please explain

Mathematics
2 answers:
Sedbober [7]4 years ago
8 0

3(x+2) = 2(2x+7)

3x + 6 = 4x + 14 (On the left side we distribute 3 through parenthesis and on the right side we do the same with 2)

3x - 4x = 14 - 6 (Here we move 4x from the right to the left side and it changes its sign. We do the same with 6)

-x = 8

x = - 8

aksik [14]4 years ago
6 0

Answer:

8

Step-by-step explanation:

3(x+2) = 2(x+7)

3x + 6 = 2x + 14

3x - 2x = 14 - 6

         x = 8

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The metal in a penny is worth about 0.505 cent . How much cents is this written as a fraction?\
Ratling [72]
0.505 means 505 * 0.001, or 505 * 1/1000. This is equivalent to 505/1000, or 101/200.
8 0
3 years ago
What is the value of x when solving the Equation 2x + 1 = -x + 4 Using the Algebra tiles
Tema [17]

Answer:

1

Step-by-step explanation:

Let's solve your equation step-by-step.

2x+1=−x+4

Step 1: Add x to both sides.

2x+1+x=−x+4+x

3x+1=4

Step 2: Subtract 1 from both sides.

3x+1−1=4−1

3x=3

Step 3: Divide both sides by 3.

3x

3

=

3

3

x=1

BRAINLIEST?

7 0
3 years ago
Anna wants to factor the polynomial p(x)=5x^4+40x. She knows that the sum of cubes formula is a^3+b^3=(a+b)(a^2−ab+b^2).
Artemon [7]

Answer:

Part A:  Option 2, A: Anna’s answer is incorrect. She correctly factored out 5x, but incorrectly identified a and b, so her answer cannot be correct.

Part B:  Option 3, B: 5x(x+2)(x^2−2x+4)

Step-by-step explanation:

p(x) = 5x^4 + 40x

p(x) = 5x(x^3 + 8)

p(x) = 5x(x + 2)(x^2 - 2x + 4)

Part A:  Option 2, A: Anna’s answer is incorrect. She correctly factored out 5x, but incorrectly identified a and b, so her answer cannot be correct.

Part B:  Option 3, B: 5x(x+2)(x^2−2x+4)

7 0
3 years ago
JK is tangent to a circle with centre H as shown below. What is HK ?<br> 8 mi<br> 15 mi
sashaice [31]

Given:

JK is tangent to a circle with center H

To find:

The length of HK.

Solution:

The image is attached below.

JK = 8 mi, HJ = 15 mi

JK is tangent to a circle.

The tangent is always perpendicular to the radius.

Therefore, m∠J = 90°

Using Pythagoras theorem:

HK² = JK² + HJ²

HK² = 8² + 15²

HK² = 64 + 225

HK² = 289

HK² = 17²

Taking square root on both sides.

HK = 17

The length of HK is 17 mi.

3 0
3 years ago
HELP high school pre cal
kogti [31]

Answer:

The option A) -4-3i is correct

Therefore the simplified given expression is (-1-6i)+(-3+3i)=-4-3i

Step-by-step explanation:

Given that the expression is (-1-6i)+(-3+3i)

To simplify the given expression as below :

(-1-6i)+(-3+3i)=-1-6i-3+3i

=(-1-3)+(-6i+3i) ( combining the real parts and imaginary parts separately and adding the like terms )

=-4+(-3i)

=-4-3i

(-1-6i)+(-3+3i)=-4-3i

Therefore the simplified given expression is (-1-6i)+(-3+3i)=-4-3i

Therefore the option A) -4-3i is correct

6 0
3 years ago
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