What is the equation of the axis of symmetry for the parabola y equals negative start fraction one over two end fraction left parenthesis x plus three right parenthesis squared minus five? x=-5 x=-3 x=-1/2 x=3the answer is -3 i just took the test 

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

How do you write something in scientific notation?