Midterm 3: Version A
For problems 1–4, perform the indicated operations and simplify.
- [latex]\dfrac{15m^3}{4n^2}\div \dfrac{12n}{17m^3} \cdot \dfrac{3m^4}{34n^2}[/latex]
- [latex]\dfrac{8x-8y}{x^3+y^3}\div \dfrac{x^2-y^2}{x^2-xy+y^2}[/latex]
- [latex]\dfrac{5}{6}-2-\dfrac{5}{n-3}[/latex]
- [latex]\dfrac{\dfrac{x^2}{y^2}-4}{\dfrac{x+2y}{y^3}}[/latex]
Reduce the expressions in questions 5–7.
- [latex]3\sqrt{25}+2\sqrt{72}-\sqrt{16}[/latex]
- [latex]\dfrac{\sqrt{m^7n^3}}{\sqrt{2n}}[/latex]
- [latex]\dfrac{2-x}{1-\sqrt{3}}[/latex]
Solve for [latex]x[/latex].
- [latex]\sqrt{7x+8}=x[/latex]
For problems 9–12, find the solution set by any convenient method.
- [latex]\phantom{1}[/latex]
- [latex]4x^2=64[/latex]
- [latex]3x^2=12x[/latex]
- [latex]\phantom{1}[/latex]
- [latex]x^2-6x+5=0[/latex]
- [latex]x^2+10x=-9[/latex]
- [latex]\dfrac{x+4}{-4}=\dfrac{8}{x}[/latex]
- [latex]x^4-13x^2+36=0[/latex]
- The base of a right triangle is 10 m longer than its height. If the area of this triangle is 300 m2, what are its base and height measurements?
- Find three consecutive odd integers such that the product of the first and the third is 38 more than the second.
- Two airplanes take off from the same airfield, with the first plane leaving at 6 a.m. and the second at 7:30 a.m. The second airplane, travelling at 150 km/h faster than the first, catches up to the first plane by 10:30 a.m. What is the speed of each airplane?