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Chapter 5: Problem 113
Subtract: \(-6.4-(-10.2) .\) (Section 1.6, Example 2)
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In Exercises \(79-82,\) simplify each expression. $$\frac{2 x^{3}(4 x+2)-3 x^{2}(2 x-4)}{2 x^{2}}$$
Perform the indicated operations. $$(x+4)(x-5)-(x+3)(x-6)$$
Use the motion formula \(d=r t,\) distance equals rate times time, and the fact that light travels at the rate of \(1.86 \times 10^{5}\) miles per second, to solve. If the moon is approximately \(2.325 \times 10^{5}\) miles from Earth, how many seconds does it take moonlight to reach Earth?
In Exercises \(79-82,\) simplify each expression. $$\left(\frac{9 x^{3}+6 x^{2}}{3 x}\right)-\left(\frac{12 x^{2} y^{2}-4 x y^{2}}{2 x y^{2}}\right)$$
Explain how to divide a polynomial that is not a monomial by a monomial. Give an example.
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