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Alika [10]
3 years ago
5

Will give BRAINLIEST!!!! Answer fast!!! If a + b + c =−2 and x + y = 10, what is -9a + 2x - 9b - 9c + 2y?

Mathematics
1 answer:
riadik2000 [5.3K]3 years ago
5 0
A^5b^3 is your answer

 
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Find the perimeter of a field that has length 2/x + 1 and width 5/x^2 -1.
Semmy [17]

Answer:

D)4x + 6/(x + 1)(x - 1)

Step-by-step explanation:

A field is basically a rectangle, so to find the perimeter of our field we are using the formula for the perimeter of a rectangle

p=2(l+w)

where

p is the perimeter

l is the length

w is the width

We know from our problem that the field has length 2/x + 1 and width 5/x^2 -1, so l=\frac{2}{x+1} and w=\frac{5}{x^2-1}.

Replacing values:

p=2(l+w)

p=2(\frac{2}{x+1} +\frac{5}{x^2-1})

Notice that the denominator of the second fraction is a difference of squares, so we can factor it using the formula a^2-b^2=(a+b)(a-b) where a is the first term and b is the second term. We can infer that a=x^2 and b=1^2. So, x^2-1=(x+1)(x-1). Replacing that:

p=2(\frac{2}{x+1} +\frac{5}{x^2-1})

p=2(\frac{2}{x+1} +\frac{5}{(x+1)(x-1})

We can see that the common denominator of our fractions is (x+1)(x-1). Now we can simplify our fraction using the common denominator:

p=2(\frac{2(x-1)+5}{(x+1)(x-1)} )

p=2(\frac{2x-2+5}{(x+1)(x-1)} )

p=2(\frac{2x+3}{(x+1)(x-1)} )

p=\frac{4x+6}{(x+1)(x-1)}

We can conclude that the perimeter of the field is D)4x + 6/(x + 1)(x - 1).

3 0
3 years ago
2^a / 2^2 = 2^3 solve for a
katovenus [111]

Answer:

a= 5

Step-by-step explanation:

hope this helps!

3 0
3 years ago
Read 2 more answers
If y equals 14, what does x equal in the following equation?
Oduvanchick [21]

Answer: the answer choices listed above are wrong the correct answer would be 7

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
I'm really confused about this question about Solving Systems by Elimination
velikii [3]

Answer:

x=10

y=2

Step-by-step explanation:

1)add the equations and find what x is.

x-y=8

+x+y=12

—————

2x=20

— —

2 2

x=10

3)fill in x for the second equation.

x+y=12

since x=10,replace x with 10.

10+y=12.

subtract 19 from both sides.

10+y=12

-10 -10

—————-

y=2

4 0
3 years ago
Can some one answer this question please show work
Lera25 [3.4K]

When you reflect across the Y axis, the Y value remains the same and the x value becomes opposite.

Answer: (5,-3)

4 0
2 years ago
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