Exam 6: Systems of Equations and Inequalities

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Solve the problem. -A person at the top of a 600 foot tall building drops a yellow ball. The height of the yellow ball is given by the equation h = -16t2 + 600 where h is measured in feet and t is the number of seconds since the yellow ball was Dropped. A second person, in the same building but on a lower floor that is 408 feet from the ground, drops a White ball 2 seconds after the yellow ball was dropped. The height of the white ball is given by the equation H = -16(t - 2)2 + 408 where h is measured in feet and t is the number of seconds since the yellow ball was Dropped. Find the time that the balls are the same distance above the ground and find this distance.

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Graph the system of inequalities. - {4x+3y12xy\left\{ \begin{aligned}4 x + 3 y & \geq 12 \\x & \geq y\end{aligned} \right.  Graph the system of inequalities. - \left\{ \begin{aligned} 4 x + 3 y & \geq 12 \\ x & \geq y \end{aligned} \right.

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Use the properties of determinants to find the value of the second determinant, given the value of the first. - start text Given end text open vertical bar 4 2 8 close vertical bar equals3 start textcomma find the value of end text \mid 32- 16- 64- 4 2 8 point

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Write the partial fraction decomposition of the rational expression. - x1(x3)(x2)\frac { x - 1 } { ( x - 3 ) ( x - 2 ) }

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Perform the row operation(s) on the given augmented matrix. - = 5 -10 25 4 2 -5

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Perform the row operation(s) on the given augmented matrix. - =5+ 1 6 11 -5 9 -6

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Write the partial fraction decomposition of the rational expression. - 7x26(x+2)(x3)\frac { 7 x - 26 } { ( x + 2 ) ( x - 3 ) }

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Graph the inequality. - x2+y225x ^ { 2 } + y ^ { 2 } \leq 25  Graph the inequality. - x ^ { 2 } + y ^ { 2 } \leq 25

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Graph the system of inequalities. - {2x+3y6xy3y2\left\{\begin{array}{r}2 x+3 y \geq 6 \\x-y \geq 3 \\y \leq 2\end{array}\right.  Graph the system of inequalities. - \left\{\begin{array}{r} 2 x+3 y \geq 6 \\ x-y \geq 3 \\ y \leq 2 \end{array}\right.

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Use the properties of determinants to find the value of the second determinant, given the value of the first. - xyzuvw123=118x3y6z+93u13v23w+3123=?\left| \begin{array} { c c c } x & y & z \\u & v & w \\1 & 2 & - 3\end{array} \right| = 118 \left| \begin{array} { c c c } x - 3 & y - 6 & z + 9 \\- 3 u - 1 & - 3 v - 2 & - 3 w + 3 \\1 & 2 & - 3\end{array} \right| = ?

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Solve the system of equations using elimination. - {2x2+xyy2=3x2+2xy+y2=3\left\{ \begin{array} { l } 2 x ^ { 2 } + x y - y ^ { 2 } = 3 \\x ^ { 2 } + 2 x y + y ^ { 2 } = 3\end{array} \right.

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Solve the problem. -The difference of two numbers is 5 and the difference of their squares is 55. Find the numbers.

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Solve the problem. -An 8-cylinder Crown Victoria gives 18 miles per gallon in city driving and 21 miles per gallon in highway driving. A 300-mile trip required 15.5 gallons of gasoline. How many whole miles were driven in the city?

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Find the inverse of the matrix. - [6336]\left[ \begin{array} { l l } 6 & - 3 \\3 & - 6\end{array} \right]

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Solve the problem. -A flat rectangular piece of aluminum has a perimeter of 64 inches. The length is 14 inches longer than the width. Find the width.

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Solve the problem. -  Given that xyzabc245=3, find the value of the determinant 2453a3b3cx2y4z5\text { Given that } \left| \begin{array} { l l l } x & y & z \\a & b & c \\2 & 4 & 5\end{array} \right| = 3 \text {, find the value of the determinant } \left| \begin{array} { l l l } 2 & 4 & 5 \\3 a & 3 b & 3 c \\x - 2 & y - 4 & z - 5\end{array} \right| \text {. }

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Graph the system of inequalities. -Graph the system of inequalities. -

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Write the partial fraction decomposition of the rational expression. - 2x31x2+13x5(x2+4)3\frac { 2 x ^ { 3 } - 1 x ^ { 2 } + 13 x - 5 } { \left( x ^ { 2 } + 4 \right) ^ { 3 } }

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Graph the system of inequalities. -Graph the system of inequalities. -

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Use the properties of determinants to find the value of the second determinant, given the value of the first. -Use the properties of determinants to find the value of the second determinant, given the value of the first. -

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