How to find angles in a triangle

Which of the following are the coordinates of the vertex of y=x^2 + 12x-9

a student asks you why it is possible to have an increase of 150% in price, but not a decrease of 150% in price. how would you answer the student?

the perimeter of a rectangle is 42inches if the width of the rectangle is 6 inches what is the length

Write 3 16/25 as a percent 0.0364 0.038 364%••• 3.8

If I got 82 out of 100 on my test and there are 50 questions how many did I miss

If x is too small that its square and higher powers be neglected then (1+3x) - 2=?

A ranger spots a forest fire on a 24-meter observation tower. The angle of depression from the tower to the fire is 29°. To the nearest meter, how far is the fire from the base of the tower?

What is the common difference in the arithmic sequence 30,27,24,21,18

600000 in standard form

What are the real and imaginary parts of the complex number? -6+2i Enter your answers in the boxes.