Solve and graph the absolute value inequality: |4x+1|<_5

What is the number 321,000,000 in scientific notation? also what is the number? ?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Which ratios are equivalent to 10: 16? check all that apply. 30 to 48 25: 35 8: 32 5 to 15