Solve the equation.
x - 
x = 5
A. {75}
B. {150}
C. {-75}
D. {-150}
Answer: A
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Give the value of the indicated trigonometric function of a vector with the indicated end point.(21, 28); Find sin ?.
A. 
B. 
C. 
D. 
Find the direction the parabola opens, the coordinates of the vertex, the equation of the axis of symmetry and draw the graph.x = 2(y - 2)2 - 2 
A. 
opens left; vertex (2, 2);
axis of symmetry y = 2
B. 
opens right; vertex (-2, 2);
axis of symmetry y = 2
C. 
opens right; vertex (2, 2);
axis of symmetry y = 2
D. 
opens right; vertex (-2, -2);
axis of symmetry y = -2
Use a proportion to solve the problem. Round to the nearest tenth as needed.A triangle drawn on a map has sides of lengths 8 cm, 10 cm, and 15 cm. The shortest of the corresponding real-life distances is 136 km. Find the longest of the real-life distances.
A. 170.0 km B. 255.0 km C. 160.0 km D. 265.0 km
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400