1)Three angles of a triangle are (2x+2)°, x°, and (2x-7)°. Find the value of x.
2) Evaluate the following:
a)(0.05)3 b)0.225÷2.5
3)A mountain is at a height of 8850m. Its base is at an elevation of 5450m. The temperature at the base is -6°C. If the temperature here drops at rate of 1°C per 100 metres, find the temperature at the top.
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Answer:
a)(2x+2)°=72°
(2x-7)°=63°
x°=35°
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