SOLUTION: 1. Simplify and evaluate: (22x5y-3z4/40x-2y-8z5)3 2. Convert to scientific notation: 0.005038 3. For f(x) = 8x – 9, find f(-3). 4. Perform the indicated operat

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: 1. Simplify and evaluate: (22x5y-3z4/40x-2y-8z5)3 2. Convert to scientific notation: 0.005038 3. For f(x) = 8x – 9, find f(-3). 4. Perform the indicated operat      Log On


   

Question 64157: 1. Simplify and evaluate:
(22x5y-3z4/40x-2y-8z5)3

2. Convert to scientific notation:
0.005038

3. For f(x) = 8x – 9, find f(-3).

4. Perform the indicated operations:
(7x2 – x + 1) – (2x2 – x – 3) – (5x2 + 3x – 10)

5. Use FOIL to multiply:
(5x – 1)(3x – 2)

6. Multiply:
(x – 4)(2x2 – 7x + 8)
thank you
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1. Simplify and evaluate:
(22x5y-3z4/40x-2y-8z5)3
Comment: I can't tell which numbers are coefficients and which are exponents.
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2. Convert to scientific notation:
0.005038 = 5.038x10^-3
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3. For f(x) = 8x – 9, find f(-3).
f(-3)=8(-3)-9=-33
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4. Perform the indicated operations:
(7x^2 – x + 1) – (2x^2 – x – 3) – (5x^2 + 3x – 10)
=7x^2-x+1-2x^2+x+3-5x^2-3x+10
=-3x+14
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5. Use FOIL to multiply:
(5x – 1)(3x – 2)
F: 15x^2
O: -10x
I: -3x
L: 2
Add them to get:
15x^2-13x+2
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6. Multiply:
(x – 4)(2x^2 – 7x + 8)
= x(2x^2-7x+8)-4(2x^2-7x+8)
=2x^3-7x^2+8x-8x^2+28x-32
=2x^3-15x^2+36x-32
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Cheers,
Stan H.