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Kitty [74]
3 years ago
8

Simplify each expression. Use positive exponents. (x–2y–4x3) –2,

Mathematics
1 answer:
Contact [7]3 years ago
5 0
The Expression is
(x^-2y^-4x³)^-2
 We can combine the x terms inside the brackets using the concept;
x ^a × x^b = x^(a+b)
Therefore, 
 (x^-2)(x^3) = x^(3-2) = x^!

Thus we get;
(xy^-4)^-2
Using the concept
(x^a)^b = x^(ab)
Therefore
 = x ^(-2×1) y^(-2×-4)
 =x^-2y^8
But using the concept; x^-a = 1/x^a
Thus, x^-2y^8 = y^8/x²
Hence the simplified equation is;
       = y^8/x²
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Answer:

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Step-by-step explanation:

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8 0
3 years ago
Evaluate the expression when x=3 and y= -2
Paul [167]

Answer:

-11

Step-by-step explanation:

To evaluate an expression with variables, replace the variables with what the question tells you to.

Replace "x" with 3. Replace "y" with -2.

-x + 4y

= -(3) + 4(-2)       Multiply 4 and -2 first to get -8

= (-3) + (-8)         Add normally. -3 + (-8) is the same as (-3) - 8.

= -11             Answer

Therefore the solution is -11.

5 0
3 years ago
Help with both questions please
Igoryamba
For the first question the answer is the second option.
For the second question the answer is the first option.

Hope I didn't mess up for your sake
5 0
3 years ago
Read 2 more answers
Which rational number does not have a reciprocal
Dmitriy789 [7]

Answer:

the rational numbers that doesn’t have a reciprocal are [math]0 [/math] (which can also be expressed as [math]\frac {0} {x}, x \neq 0 [/math] ), and any number of the form [math]\frac {x} {0} [/math].

Step-by-step explanation:

8 0
3 years ago
Helllp im doing my exam !
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