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OLga [1]
3 years ago
11

What is the area of a rectangle with a length 20 yd and a width of 16 yd?

Mathematics
2 answers:
DochEvi [55]3 years ago
7 0
The answer would be A. 320 yd2 because when you multiply 20x16 you get 320
Jlenok [28]3 years ago
6 0
A. 320 yd2 16yd times 20yd
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What is the value of the rational expression 2x^2+5x+9/x^2+2x-1 when x=-2
Sergio039 [100]

Answer:

The value of the Rational expression when x=-2 is: -7

Step-by-step explanation:

For this exercise is important to remember:

  • When a negative number is raised to an even power, the result will be positive.
  • The multiplication of signs:

       (+)(+)=+\\(-)(-)=+\\(-)(+)=-

Then, given the following Rational expression:

\frac{2x^2+5x+9}{x^2+2x-1}

You need to follow these steps in order to find its value when x=-2:

1. Substitute the given value of "x" (x=2) into the expression:

 \frac{2(-2)^2+5(-2)+9}{(-2)^2+2(-2)-1}

2. Evaluate and simplify:

\frac{2(4)+5(-2)+9}{4+2(-2)-1}=\frac{8-10+9}{4-4-1}=\frac{7}{-1}=-7

5 0
3 years ago
Read 2 more answers
Multiplying Vertically:
Ad libitum [116K]

Answer:

6. Find the product for both sets of polynomials below by multiplying vertically. (4 points: 2 points for each product)

A)

4x^4 - 4x^3 - 16x^2 + 16x

B)

4x^4 - 4x^3 - 16x^2 + 16x

7. Are the two products the same when you multiply them vertically? (1 point)

Yes, the two products are the same when you multiply them.

Making a Decision:

8. Who was right, Emily or Zach? Are the products the same with the three different methods of multiplication? (1 point)

Emily was right, the products are the same with all three different methods of multiplication.

9. Which of these three methods is your preferred method for multiplying polynomials? Why? (1 point)

I prefer the table method because it is easier to understand what is going on, know where and what to do, and it is nicely and neatly laid out in front of me.

4 0
2 years ago
Place on,number line
Alex
A goes between -1 and -1/2
8 0
3 years ago
Read 2 more answers
Which inequality is represented by this graph?
DochEvi [55]
I think it is D cause it could be equal
5 0
3 years ago
Read 2 more answers
2/3x - 11 = x/3 + 3
Grace [21]
2
3

−
1
1
=

3
+
3
2
3
x
−
11
=
x
3
+
3
32​x−11=3x​+3
2

3
−
1
1
=

3
+
3
2
x
3
−
11
=
x
3
+
3
32x​−11=3x​+3
2
Find common denominator
2

3
−
1
1
=

3
+
3
2
x
3
−
11
=
x
3
+
3
32x​−11=3x​+3
2

3
+
3
(
−
1
1
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3
=

3
+
3
2
x
3
+
3
(
−
11
)
3
=
x
3
+
3
32x​+33(−11)​=3x​+3
3
Combine fractions with common denominator
2

3
+
3
(
−
1
1
)
3
=

3
+
3
2
x
3
+
3
(
−
11
)
3
=
x
3
+
3
32x​+33(−11)​=3x​+3
2

+
3
(
−
1
1
)
3
=

3
+
3
2
x
+
3
(
−
11
)
3
=
x
3
+
3
32x+3(−11)​=3x​+3
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Multiply the numbers
2

+
3
(
−
1
1
)
3
=

3
+
3
2
x
+
3
(
−
11
)
3
=
x
3
+
3
32x+3(−11)​=3x​+3
2

−
3
3
3
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3
+
3
2
x
−
33
3
=
x
3
+
3
32x−33​=3x​+3
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Find common denominator
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−
3
3
3
=

3
+
3
2
x
−
33
3
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x
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3
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3
=

3
+
3
⋅
3
3
2
x
−
33
3
=
x
3
+
3
⋅
3
3
32x−33​=3x​+33⋅3​
6
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−
3
3
3
=

3
+
3
⋅
3
3
2
x
−
33
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3
+
3
⋅
3
3
32x−33​=3x​+33⋅3​
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−
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+
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−
3
3
3
=

+
3
⋅
3
3
2
x
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33
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3
3
32x−33​=3x+3⋅3​
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+
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33
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−
3
3
3
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+
9
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2
x
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33
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⋅
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−
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+
9
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3
⋅
2
x
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33
3
=
3
(
x
+
9
3
)
3⋅32x−33​=3(3x+9​)
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3
⋅
2

−
3
3
3
=
3
(

+
9
3
)
3
⋅
2
x
−
33
3
=
3
(
x
+
9
3
)
3⋅32x−33​=3(3x+9​)
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−
3
3
=

+
9
2
x
−
33
=
x
+
9
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Add
3
3
33
33
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2

−
3
3
=

+
9
2
x
−
33
=
x
+
9
2x−33=x+9
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−
3
3
+
3
3
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+
9
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3
3
2
x
−
33
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33
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x
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33
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4
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x
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4
2
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=
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5 0
2 years ago
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